Nintex Automation K2 Updates & Fix Packs

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

Issue DescriptionWhen you run the Sync Service, it remains stuck in a running state and does not complete successfully.Error Message:The following message appears in the AdditionalInfo column:“0 IdentityCountNotSynced and 0 LinkCountNotSynced”ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 11.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 ap

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

Issue DescriptionWhen you use this path “https:///Designer/k2workflow/api/category/category/?systemId=1&category='” which includes the trailing ‘ ' ‘ character, an “UnsafeXML” error will occur.Error Message:The following error occurs: “Exception has been thrown by the target of an invocation.”ResolutionThe fix is available in:Nintex Automation K2 (5.8)

Issue DescriptionWhen you install K2 or start the K2HostServer service, the service stops and an error occurs in server startup.Error Message:The following error occurs: “System.ArgumentNullException: Value cannot be null. Parameter name: productVersion”Followed later on by:“System.NullReferenceException: Object reference not set to an instance of an object.”ResolutionThe fix is available in:

Issue DescriptionWhen you run the SubscriptionRenewal workflow, workflow subscriptions are not renewed as expected.ResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 31.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 using the Workflow Designer Rich Text Editor, text selection and formatting functionality is restored, and SmartFields dragged into the editor will honor the configured writing direction.ResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 31. Nintex Automation K2 (5.9) Fix Pack 10.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 i

Issue DescriptionWhen you download a file using the attachment control, the request URL should not include the required Anti-XSRF (Cross-Site Request Forgery) token for request validation.ResolutionThe fix is available in:Nintex Automation K2 (5.8) Fix Pack 31. Nintex Automation K2 (5.9) Fix Pack 10.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

When you use the cursor in the formula designer, the field content does not move with the cursor movement. You can jump to the start or the end of the field, but there seems to be no way to get to the middle part of the content. ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 10. Ensure you have the correct K2 version 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 refresh the browser cache.

When you make changes to the "To" recipient in the configuration for send email step, task step notification or task step reminder sections , it sometimes generate errors and you are unable to deploy the workflow. Error"The "Task" step's Reminders tab has one or more empty To fields". ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 10. Ensure you have the correct K2 version 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 refresh the browser cache.

When you configured Nintex Automation K2 to use AAD run a sync for the first time but, an error occurs.ErrorError - 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) Fix Pack 10. Ensure you have the correct K2 version installed. See 

Issue DescriptionWhen you upgrade to Nintex Automation K2 (5.9), CRM SmartObject calls begin to slow down as user traffic increases.ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 09.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, it does not correctly convert semi-complex Workflows, where only Set Variables steps are converted and no data fields are created, resulting in a skeleton workflow with placeholders only.ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 09.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

Issue DescriptionWhen you use the "Get Permissions On List Item By ID" method, it returns no results even though the list item has explicitly assigned permissions.ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 09.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 to Nintex Automation K2 (5.9), previously created Workflows start causing issues, such as the task area no longer being displayed in workflow tasks in Workspace even though the link is correct, and a new serial number parameter being added to the task each time the workflow is opened in Designer in a new browser session.ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 09.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 ve

Issue DescriptionWhen you use the Out of Office function in the Worklist Control and configure an Out of Office exception rule, a stored XSS vulnerability can be triggered in the exception rule form.ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 09.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 standard Worklist Control and add a filter for any Date Type (e.g. Task Start Date, Activity Start Date, or Workflow Start Date) using either the "Relative Date" or "Specific Date" option, the Worklist encounters an error.Error Message:“The following error occurs:Unable to connect to server View Details.Clicking on View Details:Type: System.DateTime is not allowed for deserialization. trying to filter on any date”ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 09.Ensure you have the correct K2 version and/or Cumulative update installed. See

Issue DescriptionWhen you use the ConnectionStringEditor.exe to configure MS Graph connection strings, the fix enables you to set up an OAuth resource that provides a user authorization code token with “send on behalf of” permissions for other users, allowing emails to be sent from those users’ email addresses in workflows and forms.ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 09.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.

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  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 previous Fix Pack releases. 

Issue DescriptionWhen you click on the Workflow Server then the Schedules table header, all existing schedules should be sorted by the selected column, but only the rows on the current page are sortedResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 08.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, your Workflows are no longer being triggered and an error occurs.Error Message:The following appears in the Event Viewer Logs:“"[Detail]: Webhooks feature is enabled. Skipping Remote Event Receiver execution to prevent duplicate process instances.”ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 08. Nintex Automation K2 (5.8) Fix Pack 31.Ensure you have the correct K2 version and/or Cumulative update installed. See

Issue DescriptionWhen you access a form anonymously, a login prompt appears whilst the form is loading. When you attempt to cancel, an error occurs.Error Message:The following error occurs:“Required details cannot be accessed”ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 08.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.

Issue DescriptionWhen you upgrade, you are no longer able to edit multiple Workflows in the Designer and a Console error occurs.Error Message:The following error occurs:“ERROR TypeError: Cannot read properties of undefined (reading 'icon')” ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 08.Ensure you have the correct K2 version and/or Cumulative update installed. See

Issue DescriptionWhen you deploy a package containing SharePoint Online artifacts, the Package & Deployment tool throws an errorError Message:The following error occurs:“String was not recognized as a valid DateTime in Post Deployment”ResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 08.Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack l

Issue DescriptionWhen you use a REST service SmartObject to serialize input properties, integer fields with a value of 0 are silently dropped from the serialized JSON outputResolutionThe fix is available in:Nintex Automation K2 (5.9) Fix Pack 08.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.