Installed ubuntu-frame with wpe-webkit-mir-kiosk and only get a gray screen

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I followed the (relatively simple) instructions in official documentation to install a web kiosk on a ubuntu-core 22 raspberry pi4.

I only get a gray image and can't set the website to display. It seems something to do with wayland missing, but snap connect wpe-webkit-mir-kiosk:wayland gives me an error:

error: snap "snapd" has no "wayland" interface slots

I have tried the magical Google searches but completely at a loss to debug/fix this.

I sit in a Tesla and translated this thread with Ai:


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