This message was deleted.

This is a K3s deployment using K3s v1.26.7

The ui-plugin-operator error isn't really an error and it's been toned down in later releases. Will most likely not affect the issue you're seeing. Are there any other failed network requests or errors in the console?

Thanks for your quick reply. Ok I'll ignore that error from now on. I found an interesting issue with the GET 'cluster' subdocument. It seems to be blocked with NS_ERROR_XFO_VIOLATION error. If I double click the request, the old UI opens in a new tab showing me the driver options.

The cluster driver page, and a few others, show the older UI in an iFrame (these are slowly being ported to the new UI). There might be an issue browser side in showing it

Right ok. This is the full error in Firefox - Invalid X-Frame-Options header was found when loading “https//<URL>/n/drivers/cluster” “invalid” is not a valid directive. Does any other headers need adding or removing from my HAProxy setup maybe?

the response headers should contain

*x-frame-options:* SAMEORIGIN

That fixed it and is loading correctly now. My HAProxy config needed

http-response add-header X-Frame-Options sameorigin

adding to the config. Thanks so much for your help!

no problem!