Hi, I just purchased your last version of delta theme and login and registration doesn't work, it shows only some message as in screenshots attached. When I switch back to default OSclass theme(Sigma) registration and authentication works fine. Thanks for help to solve this.

@vasilica
There is some errors on background, maybe from facebook/gooogle login plugins.
Enable error logs.

Thanks for the answer, yes, you are right, I didn't finish to set FB login plugin yet and it was throwing a fatal error. Disabled it for now and it works. Cheers!

Cool, welcome