I've started getting the "Config flow could not be loaded" error and could use come help

I’ve been using the Adaptive Cover integration for many months now. Recently, I tried to edit the configuration, but when I click on the gear icon, I get this error:

“Config flow could not be loaded: 500 Internal Server Error — Server got itself in trouble.”

So far my troubleshooting hasn’t turned up anything useful. Other posts on the topic seem related to installing an integration, which is not where I’m having trouble. It’s installed and working – I just can’t edit it. While troubleshooting, I discovered two other integrations — Watchman and WundergroundPWS — misbehaving in the same way, so it doesn’t seem to be the Adaptive Cover integration itself that’s causing the problem.

Does anyone know what might be causing this or how I can fix it? For context, I’m running Home Assistant Container on a Synology NAS.