HA cannot access System from UI

This just started on my instance - running on a Pi5 with SSD.
All automations etc seem to be working but i cannot access HA from my iphone or companion app.
From my windows machine i can login and see my UI but i cannot get access to the System from the menus or developer tools.
I’ve been able to SSH in and tried a core rebuild and also from the CLI i tried a recent backup restore but still have the same problem

Hi, which address are you using to access your HA on the different devices?

You have to use either

Additionally, it’s important whether you are using SSL (httpS) or not with your HA