'User path' and 'Admin path' should only contain letters ('a-zA-Z'),
digits ('0-9') and underscores ('_'). The access values must not be
named 'admin' or 'user' and each value must be unique. Please change
invalid values on site indicated by *

In my browser this is indicated by red text, not *

Steps to reproduce

Go through setup wizzard and chosse illegal value for user or admin path