Can confirm https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1835660/comments/26 What I did was I changed
`COMPRESS=lz4` to `COMPRESS=gzip` in `/etc/initramfs-tools/initramfs.conf`, then `sudo update-initramfs -u`
After, without a reboot I've changed `COMPRESS` back to `lz4`, and then `sudo update-initramfs -u`
And after the reboot that error is gone.
Can confirm https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1835660/ comments/ 26
What I did was I changed
`COMPRESS=lz4` to `COMPRESS=gzip` in `/etc/initramfs -tools/ initramfs. conf`, then
`sudo update-initramfs -u`
After, without a reboot I've changed `COMPRESS` back to `lz4`, and then
`sudo update-initramfs -u`
And after the reboot that error is gone.