Configuration not saved after the "save" button is pressed

[gehring]

After updating to jellyfin 10.6 and LDAP-Auth 8.0, I can't seem to be able to change the configuration through the web ui. Changes to /var/lib/jellyfin/plugins/configurations/LDAP-Auth.xml are still properly reflected in the ui (after a refresh).

Things Tried

1. I've tried reinstalling LDAP-Auth but the issue is unchanged.
2. Deleting the config doesn't help either and a new config is never generated.
3. No difference in behavior between local access and remote access through a reverse proxy.

Logs

The jellyfin logs don't offer much guidance as to what is going wrong. A sample of the logs at the time the "save" button is pressed:

[2020-07-21 18:53:40.009 +00:00] [INF] WS "::ffff:10.0.0.2" request
[2020-07-21 18:53:52.835 +00:00] [INF] WS "::ffff:10.0.0.2" closed
[2020-07-21 18:53:53.326 +00:00] [INF] WS "::ffff:10.0.0.2" request
[2020-07-21 18:53:55.013 +00:00] [INF] WS "::ffff:10.0.0.2" closed
[2020-07-21 18:53:55.409 +00:00] [INF] WS "::ffff:10.0.0.2" request

Error taken from the chrome web console. The error is thrown when the configuration page is loaded:

VM228:41 Uncaught TypeError: Cannot read property 'addEventListener' of null
    at <anonymous>:41:48
    at w (bundle.js?v=21:14)
    at We (bundle.js?v=21:25)
    at k.fn.init.append (bundle.js?v=21:25)
    at k.fn.init.k.each.k.fn.<computed> [as appendTo] (bundle.js?v=21:25)
    at viewContainer.js?v=21:1
    at Object.execCb (alameda.js:1233)
    at defineModule (alameda.js:493)
    at main (alameda.js:1087)
    at alameda.js:363

Setup

Debian 10 running inside a LXC container

[gehring]

Added web console error message.

[gehring]

I tried a few other plugins and it seems to be widespread issue. I see the same behavior with the Email and Slack notification plugins (though I haven't tested those plugins much since I don't normally use them). I've got little experience with web apps and javascript so any help narrowing down the source of the problem would be very appreciated!