Hi all, I have a problem, that has stumped me for quite some time now. Wondering if anyone knows what I'm doing wrong. I have an UBUNTU 18.04 server (running as an LXC container) - has been working for many years without issue. Lately, I have the need to add PHP7.4 in order to get Nextcloud secured. Problem is, every time I follow the instructions online. I add the PHP version as I have done in the past.. but this time, the second I load the index.php I get an Error 500 (yellow) screen of death. By the time, I finished troubleshooting, I broke the server pretty badly. Had to restore from backup. Now, I'm all but paralyzed. Any ideas on why this is happening? I've even tried multiple ways to add the PHP. All of which are relatively straight forward. (Example) sudo apt-get update sudo apt -y install software-properties-common sudo add-apt-repository ppandrej/php sudo apt-get update sudo apt-get install php7.4So far so good. I knew that it would change the default version as Till has mentioned, so I reverted back to PHP7.2 using sudo update-alternatives --set php /usr/bin/php7.2 I checked that ISPCONFIG was working. And it was. I checked the site using an index.php file that contained a PHP script <?phpinfo();?> It worked fine on 7.2. I added the Alternative PHP version to ISPConfig in the SERVER Settings and chose PHP7.4 as the default for that website. When testing the site, I instantly get an ERROR 500. Yet, when I go to the command line and use the command: /usr/bin/php7.4 /var/www/clients/client1/web1/web/index.php. It seems to execute perfectly. I've done just about everything I can think of. I also added the supporting php7.4- modules, in the manner below. It did not help. More over, it also added php8.1 to the mix. Not sure why. apt-get -y install php7.4 php7.4-common php7.4-fpm php7.4-gd php7.4-mysql php7.4-imap php7.4-cli php7.4-cgi php-pear php7.4-curl php7.4-intl php7.4-pspell php7.4-sqlite3 php7.4-tidy php7.4-xmlrpc php7.4-xsl php-memcache php-imagick php-gettext php7.4-zip php7.4-mbstring php7.4-soap php7.4-common php7.4-opcache php7.4-mysql CGI PATH INFO: Path to the PHP FastCGI binary: php7.4-cgi Path to the php.ini directory: /etc/php/7.4/cgi I wonder if this is a simple as missing the correct path or some alias file? Any help would be greatly appreciated.