Gmail "catch all" email

I try to setup catch-all address for ...@postjobfree.com emails
I want to redirect to support@postjobfree.com -- all emails that were sent to non-defined email alias.

Gmail Domain Admin team obfuscated "catch-all" functionality a lot, but I was able to find where that catch-all setup is:
1) https://admin.google.com/

2) Click "Apps"
https://admin.google.com/ac/apps

3) Click "Google Workspace"
https://admin.google.com/ac/appslist/core

4) Click "Gmail"
https://admin.google.com/AdminHome?hl=en_US#AppDetails:service=email

5) Click "Routing"
https://admin.google.com/ac/apps/gmail/routing?hl=en_US

Until 20 minutes ago, this page "worked" for me (in the sense of showing fields where I could enter my catch-all email address).

Several days ago I entered catch-all email.
But Gmail never caught any emails that I sent to undefined email aliases.
So today I tried to disable catch-all, and then enable catch-all again.

So now "catch-all setup" page returns me an error message (when I try to simply open it):
~~~~~~~~~~~~~
https://admin.google.com/ac/apps/gmail/routing?hl=en_US
400. That’s an error.

The server cannot process the request because it is malformed. It should not be retried. That’s all we know.
~~~~~~~~~~~~~

I tried to sign out and then sign in again.
But error persists.

Does anyone encounter Google Admin errors like that with "Catch-all setup" page?