ValueError: Invalid isoformat string

I am NOT a Python programmer, but here’s what I see.

a code snippet in cloud_transfer_dialog.py:

cloud_updated_at = 0.0
if project_file.updated_at:
cloud_updated_at = datetime.fromisoformat(project_file.updated_at) ← Line 798
is_local_checked = local_updated_at > cloud_updated_at

I don’t see any place where ‘project_file_updated_at’ is initialized with a date and time.