Your Nickname has to be lower case, you just changed your description(Which doesn’t have anything to do with the login) to lower case. So change the nickname as seen here: http://prntscr.com/8dspbs to lower case.
Your Nickname has to be lower case, you just changed your description(Which doesn’t have anything to do with the login) to lower case. So change the nickname as seen here: http://prntscr.com/8dspbs to lower case.