Tks I wil try this and come back asap

Hello,
just in case : do those people have projects that are "under construction" that appear in the beginning of their timesheet ?

I think I already saw that : one project displayed at the very beginning of the timesheet was "under construction" so all the timesheet was locked (we quickly solved it by changing the wbs level of the project causing the problem)

Hope this helps

I can confirm that this erroneous state occurs under described circumstances.

In our case we had a ticket, linked to a deleted project (and so a deleted activity also) which blocked the ability to enter worktime. In addition, there was an entry of abou 174 hours booked in ticket on 18.06.2021).
The formular was disabled from the past to a concrete date (e.g. until 18.06.2021).

Steps to correct the erroneous state:
1. Removed project & activitity form ticket via database
2. Changed ticket-state from closed to re-open
3. Corrected wrongly entered hours spend on ticket
4. Changed ticket-state from closed to closed

Best regards,
Torben