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For Installation sudo apt install python3-certbot-apache For Activation sudo certbot --apache --expand -d domainname.com

Solution: 1 sudo systemctl status php8.1-fpm sudo apt-get install php8.1-fpm sudo apt install apache2 libapache2-mod-fcgid sudo apt install libapache2-mod-fcgid sudo a2enmod actions fcgid alias proxy_fcgi Solution: 2 sudo a2dismod mpm_event sudo systemctl restart apache2 sudo a2enmod mpm_prefork sudo systemctl restart apache2 sudo a2enmod php7.0 sudo systemctl restart apache2