On 31.07.20 04:52, Greg Bailey wrote: m running CentOS 8.2 on an Intel NUC, and also hit this this morning.
The way I was able to workaround this was to copy grub2-* and shim-* RPMs from the CentOS 8.2 installation media and use "rpm -Uvh grub2-* shim-* --oldpackage". The subsequent reboot worked normally. The versions of those packages on the 8.2 installation media was the same as what I had installed immediately before this morning's upgrade.
There is also a a Redhat knowledge base article regarding this issue.
https://access.redhat.com/solutions/5272311
Best regards Ulf