Thanks @crypto.piotr for reminding me about this post,
I tried to make an account yesterday without success. Today I tried once again without luck. I go through the process, confirm my email address but when I try to log in it gives me this error message even though I'm 100% sure that both my account name and password are correct.
Do you have an idea what might be causing the issue here and what can I do about it?
You could be entering the wrong username/password?
Not a problem, just proceed by clicking forgot password.