noVNC console error in Safari since upgrade to MacOS 26.4

[Reginard]

I'm running Proxmox VE 9.1.6 and seeing this error on the console since updating my Mac to MacOS 26.4 in Safari, Firefox is fine though. Clicking on the error dismisses it but the console then has a ^[c on the login prompt. Any ideas?

 

[psalkiewicz]

Hi. Safari 26.1 breaks WebSockets in some cases, possibly on local network URLs when using TLS without a valid certificate.
Try using a valid TLS certificate — since the issue appears tied to Safari's treatment of WebSockets on HTTPS with self-signed certificates, installing a trusted cert (e.g. via Let's Encrypt with a local DNS name) often resolves it.

Or... Temporarily disable Safari's WebSocket restrictions — you can try going to Safari → Settings → Advanced → enable the Develop menu, then check Develop → Disable Local File Restrictions or similar options.

 

[Reginard]

Disabling Local File Restrictions did the trick. I do have valid trusted certificates is it wasn't that. Thanks

 

[Reginard]

After rebooting my Mac the issue returned even with the 'Disabling Local File Restrictions' ticked. Oh well, I'll have to use a different browser