serviceamp Invitation link broken

Cannot activate any agents anymore because of broken Invitation mail (leads to normal login page - and then password is wrong, instead of creating the account with new password).

Tried in clean session state (anonymous tab) - with multiple agents.

Please fix!

https://haufe-advisory.servicecamp.com/login?fixedemail=email%40example.com

redirects to

https://servicecamp.teamviewer.com/LogOn/PopUp/servicecamp?returnUrl=%2Foauth2%2Fauthorize%2Fservicecamp%3F....