Linux Mint Vanessa 21 & PHP File Manager 1.7.9 error.

[Tallguy297]

I installed your PHP file manager 1.7.9 Last Changed: 2020-04-28 on the latest version of Linux Mint Vanessa 21.
When I go to http://localhost/ all I get is a blank screen.
Your previous version of your file manager 1.7.9 Last Changed: 2021-09-18 worked with no problem.
I have tested my Apache2 & PHP8.0 configuration and everything seems to be OK.

Am I missing a prerequisite?

Here is my install code...
echo -e '\033[1;33mInstalling \033[1;34mApache\033[0m'
apt-get -y -qq install apache2 >/dev/null
echo -e '\033[1;33mInstalling \033[1;34mPHP\033[0m'
apt-get -y -qq update >/dev/null
apt-get -y -qq install php >/dev/null
apt-get -y -qq install php-bcmath >/dev/null
apt-get -y -qq install php-bz2 >/dev/null
apt-get -y -qq install php-cgi >/dev/null
apt-get -y -qq install php-cli >/dev/null
apt-get -y -qq install php-common >/dev/null
apt-get -y -qq install php-curl >/dev/null
apt-get -y -qq install php-fpm >/dev/null
apt-get -y -qq install php-gd >/dev/null
apt-get -y -qq install php-intl >/dev/null
apt-get -y -qq install libapache2-mod-php >/dev/null
apt-get -y -qq install php-mbstring >/dev/null
apt-get -y -qq install php-mysql >/dev/null
apt-get -y -qq install php-xml >/dev/null
apt-get -y -qq install php-zip >/dev/null
## Create Index Page & Override limit.
mkdir -p /var/www/html
cp -f files/phpFileManager.php /var/www/html/index.php
chmod -R 0777 /var/www/html
rm -f /var/www/html/index.html
echo -e 'php_value upload_max_filesize 4.0G'>/var/www/html/.htaccess
echo -e 'php_value post_max_size 4.2G'>>/var/www/html/.htaccess
echo -e 'php_value memory_limit -1'>>/var/www/html/.htaccess
sed -i '/<Directory \/var\/www\/>/,/<\/Directory>/ s/AllowOverride None/AllowOverride All/' /etc/apache2/apache2.conf
sed -i 's/Restart=on-abort/Restart=always/g' /lib/systemd/system/apache2.service
systemctl -q enable apache2

Thank you...