I've encountered the same issue while installing Kubuntu 20.04.
In my case it was resolved by checking FS with dosfsck.
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https://bugs.launchpad.net/bugs/1839894
Title:
Installing
I managed to finally solve this by reinstalling Windows and then
installing Ubuntu 18.04.3 again. I don't know what the difference was
when I installed Windows myself(as opposed to the preinstalled version)
but doing this certainly solved the issue. I was able to dual boot after
that.
** Changed
I have now managed to get rid of this error. I had to manually delete
the directory "/EFI/ubuntu". However, I had to delete the folder both
from windows and ubuntu (booted using live usb). I find that weird since
both OSs refer to the same EFI partition and hence the ubuntu folder
once deleted
Thanks for your reply.
I had already disabled Fastboot in Windows.
I ran `chkdsk /f /r` from Windows on the EFI partition and then tried
installing Ubuntu. The installation succeeded but I was not able to boot
into Ubuntu. I used bcdedit to add grubx64.efi to the boot path but even
that did not
Thank you for taking the time to report this bug and helping to make
Ubuntu better.
I note the following messages
Aug 12 23:47:46 ubuntu kernel: [ 356.482177] FAT-fs (nvme0n1p1): error,
fat_get_cluster: invalid cluster chain (i_pos 0)
Aug 12 23:47:47 ubuntu grub-installer: grub-install: error:
