Video Error, please try another link

I get this error with most 4k links. Can someone help me pin point the reason why, please? Just now for example, trying a stream encoded with 2160p x265 10bit, HDR or not. And if I select any FHD, it plays instantly fine.

This is puzzling to me since if I go in another app to play something local on my NAS with the same 4k encoding specs, it plays fine.

I tried playing with "Link Filtering" via Settings, but so far can't figure it out.