I have a 2015 MacBook Pro running Ubuntu 20.04 which won't boot - I get a message on screen saying "Failed to set MoklistRT: Invalid Parameter ...", and the system fails to load. This started after an update and I believe it is due to Bug #1867092. My problem is that the MBP SSD has only Ubuntu 20.04 on it - MacOS is not installed. I'm unable to get a Ubuntu liveCD to boot.
Any help greatly appreciated.