Amazing.

I did the scan and found my ticket screen fully functional and all my projects.

Thank you so much.

I still have the error attached. "WBS '00002' from Project #3 is incorrect for the first of its parent (001 expected)".
I don't see what is affected by this. Everything seems to work. Is it possible to fix the error ourselves or do we need to have a support request?

This error is minor.
You may forget it.
It may come (but not sure) from Leave Project, that is expected on WBS 00000 (it is a hidden project).
Possibly "moving" the project on Gantt view with D&D may fix the issue.

You're welcome.