Servii0 2.1 on Raspberry Pi 3B will not stream to DLNA

After testing successfully using a Windows 10 Server, I decided to install Serviio on my Raspberry Pi 3, Model B (running Linux 10 - buster) since I don't want my Windows server on 24x7.
I followed the instructions available below installing Serviio v 2.1 rather than 1.9 since that is what I used under Windows. There were no issues, and the service is reported as "Active (running)" by the OS.
https://linuxconfig.org/how-to-install-serviio-media-server-on-raspberry-pi
I was able to run the Serviio console on a browser using another PC on the LAN, and setup my Shared Folders. This kept the Pi busy for about an hour gathering metadata. After that I tried accessing the DLNA server on my TVs. Three of my TVs have Rokus attached and I use the Roku Media Player for this. I also have an LG Smart TV with DLNA app. With both these setups, the Serviio Server does not show up as a Media Device. so I am unable to watch content. Again, this works on both the LG and Roku devices when Windows is used to serve Serviio.
Does anyone have any suggestions for getting this to work on the Pi?
I followed the instructions available below installing Serviio v 2.1 rather than 1.9 since that is what I used under Windows. There were no issues, and the service is reported as "Active (running)" by the OS.
https://linuxconfig.org/how-to-install-serviio-media-server-on-raspberry-pi
I was able to run the Serviio console on a browser using another PC on the LAN, and setup my Shared Folders. This kept the Pi busy for about an hour gathering metadata. After that I tried accessing the DLNA server on my TVs. Three of my TVs have Rokus attached and I use the Roku Media Player for this. I also have an LG Smart TV with DLNA app. With both these setups, the Serviio Server does not show up as a Media Device. so I am unable to watch content. Again, this works on both the LG and Roku devices when Windows is used to serve Serviio.
Does anyone have any suggestions for getting this to work on the Pi?