We have document library on which the Nintex workflow is running and assigns a flexi task to an approver. The form is built using Nintex Forms 2013.
This approver form contains lookup controls which are connected to the list columns. So when the user changes the look up value it gets modified in the main list column. However, when an approver tries to open the task assigned to them, they get the below error:
“Sorry, something went wrong
An unexpected error has occurred.
Web Parts Maintenance Page: If you have permission, you can use this page to temporarily close Web Parts or remove personal settings. For more information, contact your site administrator.”
We have went through the ULS log and found few error entries to Nintex forms as below:
Failed to handle form host page on initialize event. Error: Cannot find the task form. Please check the action's form in the Workflow Designer..
Stack trace: at Nintex.Workflow.Forms.ControlTemplates.TaskForm.3BM=(String 3RM=, FormData 3hM=) at Nintex.Workflow.Forms.ControlTemplates.TaskForm.0RM=() at Nintex.Workflow.Forms.ControlTemplates.TaskForm.vxM=() at Nintex.Workflow.Forms.ControlTemplates.TaskForm.OnInit(EventArgs e) f526259d-3955-70df-1cbe-32c7dfeeebb0
Please note this error is intermittent and there is no proper pattern of occurrence. We have verified the permission and everything looks fine.
Has there been any resolution to this issue?
I am getting the same intermittent error on one workflow; so far doing an IISRESET on the WFE resolves the error (we have 1 WFE and 1 APP Server)...
However, the error sometimes occurs again the next day on the same workflow.....
I'm getting same error, one user has approved the task but others are reporting they are receiving the Web Part Maintenance page. All have the same permissions.
ULS Log states "Failed to handle form host page on initialize event."