^
AptioMemoryFix is basically memfix 3 continued. the screwup in installer was, it just blindly removed fix3 but didn't actually replace it with the newer AptioMemoryFix which is latest fix (which, as vulgo, says supports apfs container loading and also deprecates emulated nvram)
Think the whole TL/DR of situation is. AptioMemoryFix from
https://github.com/acidanthera/AptioFixPkg has been merged in to support
https://github.com/acidanthera/ApfsSupportPkg which has also been merged in. The problem is that clover decided to delete all the deprecated files, but following installer rules for UPGRADES vs clean installs, only upgraded files that were included from previous installs package receipt (ie it didn't add the new files that replace deprecated ones it removed). So it just left users with broken configuration.
To fix for now, and going forward, make sure you do a custom install and manually select AptioMemoryFix and the optional APFS Loader (if you desire) so the install receipt for package is correct for next time you simply upgrade. get rid of fix3 as AptioMemoryFix is it's successor and fix3 isn't in clover package anymore (which is why there is no upgrade path for it)