can't assign a security role correctly

[tirrr]

Hi all, I'm getting a problem to assign security roles to a user. I have followed this documentation. But I always get this error message (picture number 1). I have made a copy of the system customizer and get error too (picture number 2). Any solution to my problem thanks all. cheers! 

[danielbazetto]

Hi @tirrr 

What type of license the user has? Are you trying to assign "per apps plan license" to him?

I believe this can be related with the type of license that the user has or the type you are trying to allocate to him, usually for this kind of problem more sensitive information would be needed, so I would highly recommend you to raise a support request with Microsoft Support.