I have that error too, 4 years later. It appears on the pixeldroid application on the device.

Fixed it:
Create:

/etc/udev/rules.d/99-dri.rules

paste:

KERNEL=="card[0-9]*", GROUP="video", MODE="0666" KERNEL=="renderD*", GROUP="video", MODE="0666"

source:

https://emby.media/community/index.php?/topic/67576-omv-docker-emby-problem-with-vaapi/&do=findComment&comment=1002606

@JPas2001 Just to clarify since this is an old thread: you have a situation where you can connect to Emby from outside your network but just not inside the LAN ?

@gzowner I wonder if this happens only with specific videos ?

ok so in emby. you add the usename and a email.

email gets sent to the user as a invite. User click on the invite Joins them the server they was invited too. The can now login using connect login via the app and see the list of servers they have been invited too. THe issue is the invite link works, but they can not connect through the emby connect list.

I inlined the image, it's better (when possible) to keep posts self contained instead of linking to outside media...

Just adding a note, in case you want to search this further. In the upstream forum, there are some examples of using a custom CSS with pageTitleWithDefaultLogo. The CSS can be set in Branding page.

@humptydumpty it should work the same way.

Other option is to use an android emulator like Nox or Bluestacks to match his version and test.

I use the mobile app everyday as well and use port 443 to connect. I put a note in https://docs.cloudron.io/apps/emby/#apps . FWIW, I use the jellyfin app as well with my emby install and that works too. Jellyfin's chromecast feature is a bit buggy, so I cannot use it all the time.

I can run a test instance for you @girish on Azure with NVidia et al using the N series VMs if you like/need a tester. Couple different config options to play with. Just LMK