Commit 371221bf2f8ed19423aa2253a302c69a54c93b58 uses command to find the path of the fsck.${type} binary. This commit is part of initramfs-tools 0.121 and therefore fixed in Ubuntu 20.04 LTS "Focal Fossa".
You can still see this error message in case btrfs-progs is not installed. So please install btrfs-progs in that case. If you still experience this failure, please open a new bug report.
Commit 371221bf2f8ed19 423aa2253a302c6 9a54c93b58 uses command to find the path of the fsck.${type} binary. This commit is part of initramfs-tools 0.121 and therefore fixed in Ubuntu 20.04 LTS "Focal Fossa".
You can still see this error message in case btrfs-progs is not installed. So please install btrfs-progs in that case. If you still experience this failure, please open a new bug report.