I am unable to connect to mumble. There of course is no password and I have tried making a cert. I have tried everything from my end. I have downloaded and installed 3 or 4 times. Any help with this would be greatly appreciated.
Once you are registered on a server as user xyz the registration is bound to your used certificate and the name xyz cannot be used without that certificate.
Simply change your name or ask the server admin to remove your registration.