@ealmonte32 Thanks for your suggestions.
Hello everyone who’s reading this topic and trying to find a solution 
In some forums you may see some guides to use “sudo su” command to gain root priviledge, but hey, don’t use it before running bash command. It will not create enough screenly folders for the “pi” user (/home/pi/screenly) which makes further steps to fail.
You can use these commands for Bullseye 22-Sep-2022 lite version (Don’t use Legacy - Buster version yet)
- sudo apt update
- sudo apt upgrade -y
<!> In case you encounter “Unable to fetch some archives” error after update/upgrade command, run:
sudo apt update --fix-missing
sudo apt upgrade -y
- bash <(curl -sL https://install-ose.srly.io)
----- Continue: y
----- Manage network: y/N depends
----- Full system upgrade: N
----- Reboot: y
In case after rebooting you do not see the Splash Screen, log in as pi and run this command
./screenly/bin/upgrade_containers.sh
or run the bash command again
bash <(curl -sL https://install-ose.srly.io)
Make sure you see tons of files “Pulling” from servers.
Good luck!