Still getting "Something went wrong"

[CNathan74]

Hi everyone,
I’ve seen that I’m not the only one encountering this issue: when making the first request to the Daikini API, I get the “Something went wrong” page.

While tinkering with the request, I found that if I remove the state parameter, I finally get the correct permissions approval screen:
https://idp.onecta.daikineurope.com/v1/oidc/authorize?response_type=code&client_id=[MY CLIENT ID]&redirect_uri=https://my.home-assistant.io/redirect/oauth/&scope=openid%20onecta:basic.integration

So it seems that the redirect is working fine and my app is functioning — I just don’t understand why it fails as soon as the state parameter is added.

[jwillemsen]

Have you tried a private window or different browser?

[CNathan74]

Yes, I tried with other browsers in private mode, and I finally found the issue. I feel so silly — I had automatically written the redirect URI with a trailing slash after oauth in my Daikin app.
I just removed the trailing / from https://my.home-assistant.io/redirect/oauth and now it works!

Sorry for the trouble — hopefully this discussion will help another absent-minded person avoid making the same mistake.