Error When Create Delete Profiles on User Manager

can’t delete / create profiles on user manager, how to fix this?

Under maintenance rebuild database that should fix it, or reboot.
I had the same issue.

have try your instruction, and not fixed. the problem still persist.

have try to upgrade routeros version, the problem still persist.
can’t delete or create profile on usermanager.

change "Name for users: " in all profiles
then u can add new profile