Fix failed to fetch new php version on your Ubuntu OS
Step-by-step guide to fix installing new PHP version.When trying to update php on the server if you get the message that new php is failed to fetch from ppa repo, follow the link.
The steps as per the answer in the link
sudo add-apt-repository --remove ppa:ondrej/php
sudo apt update
sudo apt install distro-info-data python3-update-manager update-manager update-manager-core
sudo apt upgrade
sudo add-apt-repository ppa:ondrej/php
sudo apt update