WHMCS PHP Ion Cuber Loader Help

i am trying to install WHMCS on my instance of cyberpanel, my PHP version is 8.1 I used this script: sh <(curl https://raw.githubusercontent.com/josephgodwinkimani/cyberpanel-mods/main/php_ioncube_install.sh || wget -O - https://raw.githubusercontent.com/josephgodwinkimani/cyberpanel-mods/main/php_ioncube_install.sh) and I get an error:
current php version of this system PHP-8.1
Your operating system is ubuntu
/dev/fd/63: 97: [: =: argument expected
None of the conditions met
Can someone please help me? Thanks