Cannot sign up - Arko for SketchUp

I have just installed Arko for SU, but cannot sign up, it says email/password is invalid or already registered, but I manage to register for forum here, can you help?

Hello,

There was an issue with our User Authentication vendor that is now resolved.

Please let us know if you have any further issues.

In version 2.1.0: “Email/password is invalid or already registered” when I try to register in SketchUp, but I have already registered an email