The message that a user got when they tried access an approval task link that no longer existed because it was already approved was:
Cannot restore wt.workflow.work.WorkItem.1669997171 because it no longer exists.
For most users this message is not descriptive enough to indicate to the user the reason of the error message. We would like more user friendly error messages in this situation as well as many other messages to users.
"The task you have attempted to access no longer exists because it was approved by zzz".