when i try to register i get this error message:
Error!
This email is not registered!
regards
Which browser and operating system are you using? Contact our support to register your account manually
Try to register with Chrome browser. If you are using firefox or EE browser you should allow js scripts in your browser settings
Iam using Linux as operating System and as Browser i use:
Version 0.61.50 Chromium: 73.0.3683.67 (Offizieller Build) unknown (64-Bit)
but was has this to do with your coding

Still not possible to register.
regards
Try to use another device, I think this is the only way to solve your problem, sorry