New UI on LG Webos 5.5.x TV browser fails to load

I just tried to load the new UI on my LG webos TV browser but it fails to load. I can run the old UI without any issues but the new one doesn’t load. It;s stuck at ‘loading’.

Has anyone tried this or have a workaround to get this working? It would be nice to have a shortcut to load the browser and new UI. My webos version is 5.5.0-19.

Ingo