Sign-up page has "CSRF token missing or incorrect" error

[romayankin]

Upon submission of new user details (clicking "Register" button) I get the following error:

Forbidden (403)
CSRF verification failed. Request aborted.

Help
Reason given for failure:

    CSRF token missing or incorrect.

I have tried various options but none of them seemed to have worked.

I have only tried registering for a new user because I could not find passwords for the ones you have pre-configured - that would have solved my problem if you included passwords of pre-configured users somewhere in the docs.