Sorry if this has already been posted but I'm struggling to find a solution.
I'm in the process of moving off Centos7, so my first step to easily move my existing installation was to move to Zabbix5 on RHEL8, with the plan of then upgrading to Zabbix7 and finally upgrading to RHEL9.
After completing the OS upgrade to RHEL8 Zabbix is now complaining that the PHP GD modules are missing.

This is unusual as the packages are installed
And I've also confirmed that the PHP is the correct version and in support for V5

I'm struggling to understand where Zabbix gets its php information from and why it thinks the GD modules are not installed or enabled. I'm hoping this would be a quick config fix so I can proceed with upgrading to V7.
I'm in the process of moving off Centos7, so my first step to easily move my existing installation was to move to Zabbix5 on RHEL8, with the plan of then upgrading to Zabbix7 and finally upgrading to RHEL9.
After completing the OS upgrade to RHEL8 Zabbix is now complaining that the PHP GD modules are missing.
This is unusual as the packages are installed
And I've also confirmed that the PHP is the correct version and in support for V5
I'm struggling to understand where Zabbix gets its php information from and why it thinks the GD modules are not installed or enabled. I'm hoping this would be a quick config fix so I can proceed with upgrading to V7.