"Unfortunately something went wrong" message ("Focus" error)

Hi, I got Jitsi working on my own server.
I’m trying to implement authentication, and I get this message when trying to join/create a class:

Here are some errors from the console:

Logger.js:154 2020-04-22T16:46:31.516Z [JitsiMeetJS.js] <Object.getGlobalOnErrorHandler>:  UnhandledError: null Script: null Line: null Column: null StackTrace:  Error: Focus error, retry after 1000
    at u._allocateConferenceFocusError (moderator.js:446)
    at moderator.js:373
    at I.Handler.handler (strophe.umd.js:2716)
    at I.Handler.run (strophe.umd.js:1875)
    at strophe.umd.js:3157
    at Object.forEachChild (strophe.umd.js:830)
    at I.Connection._dataRecv (strophe.umd.js:3146)
    at D.Bosh._onRequestStateChange (strophe.umd.js:5012)

Logger.js:154 2020-04-22T16:46:31.516Z [modules/xmpp/moderator.js] <u._allocateConferenceFocusError>:  Focus error, retry after 1000 <iq xmlns=​"jabber:​client" type=​"error" to=​"34a73067-bdaa-4d9f-a115-a68bbb4e7888@guest.MYDOMAIN.com/​090c6334-6c1b-4891-ad80-8b030241145c" from=​"focus.live.MYDOMAIN.com" id=​"d01ce53a-42f8-4e83-af6e-dbdd7bfed30e:​sendIQ">​…​</iq>​
s @ md5.js:1
u._allocateConferenceFocusError @ md5.js:1
Logger.js:154 2020-04-22T16:46:31.526Z [conference.js] <Q._onConferenceFailed>:  CONFERENCE FAILED: conference.focusDisconnected focus.live.chyeshiva.com 1
Logger.js:154 2020-04-22T16:46:32.553Z [JitsiMeetJS.js] <Object.getGlobalOnErrorHandler>:  UnhandledError: null Script: null Line: null Column: null StackTrace:  Error: Focus error, retry after 2000

Can anyone help me debug this?

I was able to avoid the error and receive the “Password Required” login page by commenting these settings out:

    // When using authentication, domain for guest users.
    // anonymousdomain: 'guest.MYDOMAIN.com',

    // Domain for authenticated users. Defaults to <domain>.
    // authdomain: 'live.MYDOMAIN.com',

But that seems wrong. Shouldn’t I need those 2 lines there?!