Comment 30 for bug 1798171

Hello
I have been having the issue described by Jean in the original description. Same exact error message when trying to boot Ubuntu 18.04, seems like Grub isn't being installed correctly.
This issue is new after a Windows update and I wasn't being given the option to boot into Linux.
I reinstalled (from mint to Ubuntu), and now am seeing the error message as above.
I'm running a Lenovo Thinkpad 13, and everything has been working fine until this Windows update.
I'm a bit of a noob, so any help/advice would be very appreciated.