That's a good idea to check and see if this very nebulous and nonspecific error from Clover bootloader has any definite SINGLE cause.
In my experience it has no Single cause we can pin point.
At a time when Clover is about to hand full control of the last stage of booting over to the OS Kernel for further booting it does not find a critical kext it needs or a configuration it needs to load that critical kext, or finds some incompatible kext asked to be injected by a faulty configuration, a System Definition for which a certain kext or configuration is inappropriate is in the config.plist_SMBIOS or CLOVER does not have the required permission to load a non-apple kext (most kexts we use are not native) because SIP is ENABLED instead of disabled with CsrActiveConfig at 0x67 in Rt variables..
In other words various changes have to be gingerly made on a trial and error basis in different sections of CLOVER until we find the right combination for that particular hardware! If we have succeeded with a closer hardware, there is more confidence in suggesting troubleshoot. If one has created a system taking all these pains and documented all the steps both the right and wrong ones with concurrent notes , sketches, and images, the task becomes easier. But most will feel exhausted by the time it is completed and cares less about documented and reporting to the forum. Hence searches are often unrewarding.
You are worried about pulling your hair out from your scalp ! I am worried about pulling my cerebral grey matter out of my skull
