Bug#989962: shim-signed fails to boot
My system is a DELL precision T3600 (circa 2013)
After the latest update (Debian 10.10) the system failed to boot with the message about MoklistRT out of resources.
The system does not have secure boot, I'm not even sure if it supports it.
I managed to boot it by adding a EFI boot option pointing to grubx64.efi.