The Codex App has been renamed to SemanticHub and temporarily moved to https://semantichub.eu.
In addition we moved to a different tenant for authentifcation.
Due to limitations in the free tier of Auth0, we unfortunately were not able to migrate your passwords to the new tenants database.
Therefore for logging in you will need to ask for a password reset through the "forgot password" option.
The model database has not been touched so you can access them as usual after resetting the password.