Package apache2 has no installation candidate

Package apache2 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E Package apache2 has no installation candidate

Package apache2 has no installation candidate
sudo apt-get update && sudo apt-get upgrade

Ensuite installer Apache2

sudo apt-get install apache2

sudo apt install php libapache2-mod-php

sudo apt-get install php-curl