Hi I also having same issue this afternoon, suddenly no internet Connection, call TM, ask to restart Modem, after restart, internet is there but the Auth light is OFF, is there any problem?
By the way I on Unifi Lite and another surprise is call is click to TP Link webpage, key the User and New Password, it says wrong, any idea, could this be hack or anything else?
Another Shock is my Office Unifi, TP Link remain as default User & Password also have same message - Wrong password until TM Came and reset the Modem and reinstall again.

Please help, TQ