If I click on “options” or “deactivate” for any plugin in the Plugin Management panel, a 404 error results. The options to not appear and the plugin does not deactivate. No errors appear in the error log.
Possibly related: all of the images next to the plugins in the Plugin Management panel show as broken and do not load when I try to load them directly, even though they are where they’re supposed to be on the server.
For example, this image does not load:
/wp-admin/wp-content/plugins/simple-press/admin/resources/images/sp_Yes.png
Its permissions are 644, as are the other non-loading images in that folder.
Also possibly related: my entire website is currently behind an htpasswd. But I am able to do everything else fine, as far as I can tell.