Extensions configuration - Save button is greyed out

I’m trying to configure a few extensions for my freshly installed Home Assistant (HA-OS).
It seems as the extensions cannot save any configuration. The “Save” button is greyed out. When clicked on, it turns green, but my changes are gone when reloading the configuration.

In particular, I’m seeing this for mosquitto and Node-Red, but those are the only ones I’ve tried.

Is there a way to configure these from ssh? (I’ve got it set up for both the host system and the docker instance.)