You need to assign test case to the session not opposite

I've just find a strange way to assign:
- From admin account, in menu "Access right > Access mode to Data", I change All change from Manager to manager+ to Project members for "Test case" and "Test cession" function.

I don't know why "Manager" cannot do it. Strange!

Have you checked access to forms?

Yes, they are all ticked for Project members.

I mean, project members role can access to Test case & Test cession.
But the problem is, he cannot link (in the test case run area) a test cession to a test case with Property define in "Access mode to data" of Manager. But, Manager+ is possible.

Manager should work if Project is defined on the test session : then users with Manager rights assigned to the project should be able to add test cases to the test session.
If Project is not defined, then only users with Manager+ rights (mean manager for any project) can add tests cases to the session.
I will verify if it work correctly this way.

Rights management was not very clear.
It is fixed in V3.0.1.
Coming soon ...