Backend/Admin Settings panel invisible/nonfunctional

When clicking the "settings" menu entry in the admin area, the dropdown arrow moves like it should but nothing appears and no settings are accessible. This is an OTP install, but while in the IRC seeking help, another user noted they had the same issue when building from source.

The System:

Pleroma OTP
Backend 2.4.2
Frontend b13d8f7e
running on Debian 10 with all packages up to date

The install was originally configured to not allow config from inside of the DB, but this configuration option was changed immediately after installing. It appears to be a single variable in the config and I don't know why that would be the problem.

What I've Tried:

Restarting instance
Restarting VPS
Restarting nginx
Clearing browser caches
Changing browsers entirely
Making sure no scripts are blocked
Looking at the config file
Looking at the javascript console to make sure no errors were being thrown

A simple (and ultimately probably fairly useless) gif of the issue is available here.

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