Same issue here. Was a machine that I had not touched for several months. Booted it and after updating, got this error.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1940900 Title: Grub failed boot detection - invalid enviroment block To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1940900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs