Home Assistant Core, Google Assistant, Docker, Duckdns, Linuxserver/Swag container (nginx, letsencrypt...)

If you have this combination

and get stuck when trying to link your home assistant to your action. Login works but no devices is added and the service is not linked. No logging what so ever. This was the little error I missed, subdomains has to be wildcard not empty.

Setting up Linuxserver/swag this config has to be set

- SUBDOMAINS=wildcard

Then linking works. Many unnecessary hours spent here.

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