Sometimes you can get the error like “User Type “XX” is Not Active” message while you are creating a new user via SU01, in this case it’s a good idea to check transaction USMM (System Measurement) transaction code to clarify the issue…

In this example you can see the same error for the User Type : 91 in below picture ;

In this case, you need to execute the transaction code USMM to activate related user type in your system, of course you need to consider your SAP license agreement to avoid the license problems.

After saving the related page, now you should continue your process without any problem…