omv-mediabrowser latest version - FireTV/SPMC cant play any file/ browsing very slow

Reset peissions in the share in question?
That solved many thing for me in different sitiations

I should make a video so you guys can see how fast mine is now...

Of course, when changing from the old version to this new release it's recommended to reset the media sources permissions. The old plugin managed it differently and even custom commands where published to make it work. All that stuff is now disturbing.

Better to reset all ACL for your folders and reapply permissions for mediabrowser user. It may also write.