Nintex Automation K2 Updates & Fix Packs

Important Security Update:An important security hardening update was addressed in Fix Pack 33. We strongly recommend that all customers upgrade to this version or a later version to ensure you benefit from this security enhancement. IMPORTANT:If you perform a reconfigure without reinstalling the fix pack, users will not be able to log into Nintex Automation Designer/Manager/Workspace/Runtime after the reconfigure completes and the below error will occur:“HTTP Error 500.19 - Internal Server Error” NOTE:  If you have client tools installed, please do a manual IIS Reset after installing the Fix Pack. Fix Pack Release Date Download Link Fix Pack 01 23 October 2024 Contact Support for this Fix Pack Fix Pack 02 30 October 2024 Contact Support for this Fix Pack Fix Pack 03 8 November 2024 Contact Support for this Fix Pack Fix Pack 04 20 November 2024 Contact Support for this Fix Pack Fix Pack 05 12 December 2024 Contact Support for this Fix Pack

Issue DescriptionWhen you upload files larger than 1 MB, an error occurs.Error Message:The following error occurs: “Error reading HTTP body”ResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 34.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Important Security Update:An important security hardening update was addressed in Fix Pack 13. We strongly recommend that all customers upgrade to this version or a later version to ensure you benefit from this security enhancement. IMPORTANT:If you perform a reconfigure without reinstalling the fix pack, users will not be able to log into Nintex Automation Designer/Manager/Workspace/Runtime after the reconfigure completes and the below error will occur:“HTTP Error 500.19 - Internal Server Error”NOTE:  If you have client tools installed, please do a manual IIS Reset after installing the Fix Pack. Fix Pack Release Date Download Link Fix Pack 01 22 January 2026 Contact Support for this Fix Pack Fix Pack 02 10 February 2026 Contact Support for this Fix Pack Fix Pack 03 26 February 2026 Contact Support for this Fix Pack Fix Pack 04 6 March 2026 Contact Support for this Fix Pack Fix Pack 05 11 March 2026 Contact Support for this Fix Pack Fix Pa

Issue DescriptionWhen you use the Tab key to navigate a form and select a value in a drop-down list, pressing Tab does not submit the selection. Instead, focus moves to the browser, requiring you to tab through the browser controls before returning to the form. On the second attempt, the selection is submitted and focus moves to the next control.ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 14.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you migrate from Exchange Web Services (EWS) to Microsoft Graph, emails sent from a Distribution List may no longer be delivered successfully.Error Message:The following error occurs:“"Error","General","1","GeneralErrorMessage","MsGraphMessageDestination","1 SourceCode.MessageBus.MsGraphDestination: Email Send Falied, Error: Status Code: NotFoundMicrosoft.Graph.ServiceException: Code: MailboxNotEnabledForRESTAPIMessage: The mailbox is either inactive, soft-deleted, or is hosted on-premise.”ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 14.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Important Security Update:An important security hardening update was addressed in Fix Pack 01. We strongly recommend that all customers upgrade to this version or a later version to ensure you benefit from this security enhancement. IMPORTANT:If you perform a reconfigure without reinstalling the fix pack, users will not be able to log into Nintex Automation Designer/Manager/Workspace/Runtime after the reconfigure completes and the below error will occur:“HTTP Error 500.19 - Internal Server Error”NOTE:  If you have client tools installed, please do a manual IIS Reset after installing the Fix Pack. Fix Pack Release Date Download Link Fix Pack 01 30 June 2026 Contact Support for this Fix Pack Fix Pack 02 5 August 2026 Download Fix Pack 02  Prerequisites and DependenciesThe Fix Packs are only compatible with Nintex Automation (5.9) products. Because Fix Packs are cumulative, each new Fix Pack contains the updates and fixes that were included with the previou

Issue DescriptionWhen you upgrade your environment, button icons may no longer display on Runtime Forms that use the legacy responsive themes (Blue Void, Grey Void, or Lithium).ResolutionThe fix is available in:Nintex Automation K2 (5.9.1) Fix Pack 02.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you deploy or validate new or existing workflows, you may encounter Application Lifecycle Management (ALM) errors on the Task Reminder step because the To field in the task recipient email is now validated as a required value.ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 14. Nintex Automation K2 (5.9.1) Fix Pack 02.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you save a document as a PDF, the operation may fail and display an error message.Error Message:The following error occurs: “'The PDF could not be saved' "Invalid length for a Base-64 char array or string.”ResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 34. Nintex Automation K2 (5.9) Fix Pack 14. Nintex Automation K2 (5.9.1) Fix Pack 02.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you run the Refresh All operation for SharePoint, an error may occur and prevent the operation from completing successfully.Error Message:The following error occurs: “Error converting data type nvarchar to datetime.”ResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 34.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

DescriptionThis Fix Pack introduces Microsoft Graph support for email functionality, enabling integration with modern Microsoft 365 authentication and Exchange Online services.This enhancement extends Microsoft Graph support to the following areas:Workflow Mail Events Workflow Task Notification Emails SmartForms Email Actions K2 Studio (thick client) Mail Events Exchange Online integrationResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 34.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.Additional InformationNintex Help for latest version of K2:https://help.nintex.com/en-US/nintexautomation/userguide/current/Content/K2-Management-Site/Feature…Microsoft article:Retirement of Exchange Web Se

Issue DescriptionWhen you double-click an inline function added to the To field of a mail event, the SmartField Composer may take a longer time to open.ResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 34. Nintex Automation K2 (5.9) Fix Pack 14. Nintex Automation K2 (5.9.1) Fix Pack 02.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you migrate to SPFx, document upload workflows may start duplicate instances for previously uploaded documents and stop triggering for newly uploaded documents. Duplicate workflow events may also occur.ResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 34.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you apply formatting to input controls such as Picker, Drop-Down, Text Box, and Text Area controls, the configured format may not be applied consistently to watermark text at runtime. As a result, the watermark for some controls may be displayed using different formatting, causing the form to appear inconsistent.ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 13. Nintex Automation K2 (5.9.1) Fix Pack 02.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you upgrade and reconfigure Workflow email notifications to use Microsoft Graph instead of Exchange Web Services (EWS), all Workflow email steps fail after the configuration is completed.Error Message:The following error occurs:“The request body must contain the following parameter: 'grant_type'.”ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 13. Nintex Automation K2 (5.9.1) Fix Pack 02.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.ConsiderationsWhen you copy HTML into K2 Studio, ensure that the HTML is correctly formatted before saving or deploying your Workflow.HTML elements that contain line breaks within their opening tag may not be parsed correctly. As a resu

Issue DescriptionWhen you create right-to-left (RTL) rich text content, list structures and other formatting elements do not display correctly.ResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 33.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.ConsiderationsWhen authoring content in right-to-left (RTL) mode, if you want to insert a variable at the end of the text, first press the Space bar to create an empty space and position the cursor correctly. You can then insert the variable, which will appear adjacent to the surrounding text as expected.

Issue DescriptionWhen you configure a workflow to start on the "Item Added" event in SharePoint Online lists or libraries, the workflow does not start as expected.ResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 33.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.Useful InformationThere is a new optional input property on the SharePoint Helper Methods SmartObject, Process SharePoint Refresh All List Webhooks, called RefreshAll. This is set to 'false' by default. If set to 'true' it will refresh all list subscriptions and not just expired ones.

Issue DescriptionImplemented enhancements to improve validation and handling of server-side requests.ResolutionThe fix is available in:Nintex Automation K2 (5.9.1) Fix Pack 01. Nintex Automation K2 (5.9) Fix Pack 13. Nintex Automation K2 (5.8) Fix Pack 33. Nintex Automation (5.7) Fix Pack 29.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you modify the “To” recipient section in the email reminder configuration, the changes may sometimes be validated successfully, while other times they result in errors which prevent the Workflows from being redeployedError Message:The following error occurs:“The "Task" step's Reminders tab has one or more empty To fields”ResolutionThe fix is available in:Nintex Automation K2 (5.9.1) Fix Pack 01.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you manually configure K2 for Azure Active Directory (AAD) for the first time it fails and an error occurs.Error Message:The following error occurs:“Error - arrayat SourceCode.Sync.SyncKey.GetStorage(Byte[] array, PropertyType type)at SourceCode.Sync.SyncKey.Create(String key)at SourceCode.Sync.Storage.Sql.Models.Identity.CreateScimId(Int64 instanceHashKey, String identifierNamePart, IdentityType identityType)at SourceCode.Sync.Storage.Sql.Repositories.ProviderRepository.EnsureIdentity(ProviderInstance instance, IIdentityInstruction instruction)at SourceCode.Sync.Storage.Sql.Repositories.ProviderRepository.d__5.MoveNext()”ResolutionThe fix is available in:Nintex Automation K2 (5.9.1) Fix Pack 01.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is

Issue DescriptionWhen you attempt to install the Claims Service, installation will fail during the prerequisite validation even if the required .NET 10 runtime is correctly installed.Error Message:The following error occurs:“Dependency for 'Runtime' not met”ResolutionThe fix is available in:Nintex Automation K2 (5.9.1) Fix Pack 01.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you upgrade, the Customer Relationship Management (CRM) SmartObject calls slow down as user traffic increases.ResolutionThe fix is available in:Nintex Automation K2 (5.9.1) Fix Pack 01.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you use the Workflow Importer Tool, complex Workflows may not be fully converted, with only Set Variables steps being migrated and no associated data fields created, resulting in a mostly empty workflow skeleton with placeholders.ResolutionThe fix is available in:Nintex Automation K2 (5.9.1) Fix Pack 01.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you use a supported non-English language, the initial Full Sync on a Provider completes successfully and all users are synced. However, if you attempt to run another Full Sync on the same Provider, it instead runs a Quick Sync. Switching the browser language back to English allows the Full Sync to run successfully again.ResolutionThe fix is available in:Nintex Automation K2 (5.9.1) Fix Pack 01.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.

Issue DescriptionWhen you navigate to the Sync Engine page, you may notice some of the text is displayed in English even when the language is set to Arabic, French, German or SpanishResolutionThe fix is available in:Nintex Automation K2 (5.9.1) Fix Pack 01.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed. Download the latest Fix Pack using the links in the table above for the version you require. Install the Fix Pack to apply the fix. It is recommended to clear browser cache and refresh the page.