OK, wild guess here. It helped me in the past change you DNS, in your router to Cloudflare:
Couldn't hurt.
Let me see if that works
Hi @Robel,
Thanks for keeping the Roku Community posted!
Due to geolocation restriction certain channels may not work when using a VPN. Try connecting to a mobile hotspot or any regular network to see if you're able to access it.
Keep us posted!
Thanks,
Rey