I keep getting an "Unknown error happened: global name 'item_id' is not defined"
Please clarify - are you referring to the "View All Completed" view or the list of completed tasks within a project accessed through the circular icon at the bottom?
Assuming it's the first case - was this task completed in a project that doesn't exist anymore or that's archived?
Completed tasks within a project itself.
We are now looking into the issue.
This issue has now been fixed.