The most common cause of this error message is that a user has been deleted from the system (or removed from their Security Profile) and so any WorkFlow Form records they created/approved/otherwise had involvement with have now become "corrupt".
This can be resolved by recreating the user and placing them in a Security Profile again - at which point all of their records will return to normal.
If the user was deleted because they left the company please look for How to deal with a user leaving the company.
If you are unsure of which users have been deleted, or do not believe any users have been deleted, please see the following Get support in FocalPoint and reference the title of this article.
Error - 'ExecuteDataLink: Error handling request - Object reference not set to an instance of an object.' when editing a WorkFlow Form record
Updated over a month ago