Sharing breach while accessing / Violazione di condivisione durante l'accesso

I hope that someone can help me with this problem.

I just installed Solidworks for student 2020-21.

I made a simple cantilever beam and I proceed to static simulation.

The analysis didn't run because of an error of violation. I attached the window with the error written.

The same error appeare when I modify geometry and try to save again.

SolidworksEducator / Student