Application URLs doesn't work

[cvpsmith]

The app doesn't allow the creation of x-scheme-handler URLs, so URLs such as vscode:// , rustdesk:// , mailto: , etc. don't work. So far as I can tell, the app only supports http:// or https:// type URLs.

[ganigeorgiev]

If you mean custom schemes for the mail Action url {APP_URL} parameter then this is not supported at the moment (alternatively you can replace the parameter with a hardcoded version of your url). The mail templates and their configurations are migrated to each individual auth collection as part of the refactoring and I'll consider loosing the validators.