I keep having this black bar appear at the bottom of the basic site map page.
[SSE subscription failed: running in fallback mode]
Ive searched around, and all the articles where this error is happening don’t seem to apply to me. No reverse proxy etc.
Openhab 2.5 is running on a Pi 4, happening in chrome and safari browser running on Mac book. The error persists even if I remove all but 1 item in the site map.
I’ve also seen this happen if you have a bogus binding in your addons.cfg or addons.config. But, if that were the case, you would see installation failures reported every minute in your log file.
FWIW, I had some similar error messages both in the Basic UI and the new Main UI (OH3) today in combination with 401 errors from the REST API, and I could resolve these problems by turning on the basic auth + implicit user roles settings under API Security. Hope this may help someone else
For me, the problem was that my browser (Safari) somehow still used old credentials for Basic Auth. Unfortunately, deleting this data is not so easy, but I was then able to do so by simply calling the URL with incorrect credentials. Something like https://wronglogin:credentials@YOURURL.com. After that i could call the correct url and login without any problems.