"Access denied" error message

Hello,

a colleague gets this error a while after he has started RDM:


When he gets this error he is not doing anything - it just appears in the upper left corner. Without clicking on OK RDM is not usable. He can do anything in RDM and he does not recognize anything that is not working.

Has anyone an idea what causes this? Is there a Log where something useful could be found?

Only he has this problem - I personally never had it and I don´t know of any other colleague with this problem.

Thanks a lot for your help!

Brgds Andreas