When some users try to navigate to a SharePoint subsite that has Nintex Live features enabled in under the site collection settings, they will get an error message similar to the following:



Checking the ULS logs the follwoing error is found:
System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.   
at Nintex.Workflow.ExternalStart.ExternalStartExtensions.VerifyExternalStartEnabled(Boolean throwException)    
at Nintex.Workflow.ServerControls.SiteActionsWorkflowMenu.IsExternalEnabled()  
    

 

To resolve this issue you can do either one of the following.

1. Redeploy the NintexLiveCore.wsp solution if the you want it running on the farm.
2. If you do not want the NintexLiveCore.wsp solution, you should disable the prerequisite services for Nintex Live and external settings and stop the Nintex Live Workflow Service running on the server.

Sorry, something went wrong. An unexpected error has occured.

Upon checking the logs, it seems the issue is coming from a failure to load the Nintex Live dll. When the subsite page is opened, behind the scenes we check if the External Start feature is enabled and load it’s dependencies if it is enabled with the Nintex Live.dll being one of the dependencies

The likely cause of this issue is that you may have retracted the NintexLiveCore.wsp solution and either didn’t stop the Nintex Live Workflow Service running on the server or didn’t disable the prerequisite services for External Start within the Nintex Live Workflow Service.