Well I got this MineCraft account from a friend since he stopped playing MineCraft, I tried his and my mail, and the password reset mail never got delivered.Did you already register an account once before and have you forgotten your password? Or have you never set up an account and it gives this error? If you have had an account before I'd suggest you to try to recover your password first.
this is the support subforumKeep on mind you can always start a conversation with any stafff-members if you got questions or if you need help.
Hope you have great day :)
Thank you!you’ll have to email support@cubecraft.net and include your username and the error code.
this is the support subforum