Comment 18 for bug 686859

still ocurring in 20.04.1 - I needed to install ubuntu alongside an existing partitioned gpt lvm thin pool disk.

could not install grub on selected disk, now I can't get past the error, as I can't select any other disk nor choose "continue without a bootloader" because the OK button does absolutely nothing.

this is enormously frustrating. I had to delete the curses I wrote first. why is this an issue in 2020?