The commonly referred to 2.2 nulled was a github release. It called on the X Code website to run installer. Since X Code website is down, it won't work.
This was the old github script:
#!/bin/bash
RELEASE=unknown
FILE=xt-2.2.0-nulled2.sh
SOFT_KEY=iptv
if [ -f /etc/redhat-release ]; then
version=$( cat /etc/redhat-release | grep -oP "[0-9]+" | head -1 )
RELEASE=centos$version
elif [ -n $(which lsb_release 2> /dev/null) ] && lsb_release -d | grep -q "Ubuntu"; then
version=$( lsb_release -d | grep -oP "[0-9]+" | head -1 )
RELEASE=ubuntu$version
elif [ -n $(which lsb_release 2> /dev/null) ] && lsb_release -d | grep -q "Debian"; then
version=$( lsb_release -d | grep -oP "[0-9]+" | head -1 )
RELEASE=debian$version
fi
wget -q "
http://xtream-codes.com/get_installer.php?type=bash&os_key="$RELEASE"&soft_key="$SOFT_KEY -O "$FILE"
if [[ -s $FILE ]] ; then
chmod a+x $FILE
bash $FILE
else
echo "Your Operating System Version IS NOT supported!

"
fi
iptables -I INPUT -j ACCEPT
iptables-save > /etc/network/iptables.rules