[Plugin: Cimy User Extra Fields] failed

Hello,
I Installed this Plugin and activated it. I set the option “Enable email confirmation” to on.
When I register a test-user I get the confirmation-Email. But when I click the links the message occur the key don’t match.

The link is the follow:
https://www.accessblog.de/wp-login.php?cimy_key=510b0c08101c91d6&action=cimy_uef_redirect&redirect_to=https://www.accessblog.de/

I test it twice with same result.
Whats wrong?

Regards