Registration problem

After clicking on "Link to e-mail address verification" got web page with address

https://devsitter.app/dashboard?continue
and content:

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Fri May 24 20:06:43 UTC 2024

There was an unexpected error (type=Not Found, status=404).

- - -
The email address has been successfully verified.

Web browser:

• Brave, Version 1.66.113 Chromium: 125.0.6422.76 (Official Build) (64-bit)

• Few adblockers enabled.