If I try without SSL (i.e. http:// ) I get a least a response, saying that http is relayed to https.
Meanwhile I did a complete re-installation of HA, and moved all configs and flows from the old to the new instance. Lost 4h, but at least everything works now.
Funny enough, the dashboard still does not work with https, only with http. Also HA Lovelace works fine with https…
There has been something up with nodered and ssl/auth since may. System updates seem to bring up odd behavior. The most common being loss of debugging. Another is ssl access, I lost it after core update 7.4.
Some have had luck with complete reinstalls, some like yourself, it does nothing. I’m just leaving it as ssl off, using http since it’s only local for me.
I will try the “NGINX Home Assistant SSL proxy” Add on. Using reverse proxy for SSL handling with components like node-red seems to be the cleaner approach to handle SSL across services / applications on HA anyway.
Thank you for that information. Glad to know that it is not something only showing on my installation. For now http works fine, but as I have all automations implemented in node-red, I would feel a bit better having the node-red dashboard protected by SSL.