Community Tip - If community subscription notifications are filling up your inbox you can set up a daily digest and get all your notifications in a single email. X
Unable to find a datum plane- used as feature sketch plane
You have not provided much information for us to diagnose your issue.
Can you provide more information? Screenshots / Attach Model
There are many possible issues:
Is it an internal datum plane? - Expand the feature
Is there a group that contains the feature.
Have you tried using the search function to find it in the tree?
....