So I installed a new version of DA Beta on CentOS 8 yesterday then converted to CL8.
For PHP 7.4 there was a constant notice in CustomBuild and when I tried the update it kept failing with an error about oniguruma being required.
I checked "dnf list oniguruma" and it was installed.
But oniguruma-devel was not installed by default, I tried everything in CustomBuild but it did not work.
I had to manually install "dnf install oniguruma-devel" then go back to CustomBuild and run the update.