installed initramfs-tools package post-installation script subprocess returned error exit status 1

[Scott Stensland]

sudo apt-get upgrade

Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up initramfs-tools (0.133ubuntu13) ...
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.133ubuntu13) ...
update-initramfs: Generating /boot/initrd.img-5.4.0-13-generic
E: /usr/share/initramfs-tools/hooks/fsck failed with return 1.
update-initramfs: failed for /boot/initrd.img-5.4.0-13-generic with 1.
dpkg: error processing package initramfs-tools (--configure):
 installed initramfs-tools package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1)

x86_64
5.4.0-13-generic
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu Focal Fossa (development branch)"
NAME="Ubuntu"
VERSION="20.04 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu Focal Fossa (development branch)"

dpkg -l|grep initramfs

ii busybox-initramfs 1:1.30.1-4ubuntu5 amd64 Standalone shell setup for initramfs
ii cryptsetup-initramfs 2:2.2.2-2ubuntu1 all disk encryption support - initramfs integration
iF initramfs-tools 0.133ubuntu13 all generic modular initramfs generator (automation)
ii initramfs-tools-bin 0.133ubuntu13 amd64 binaries used by initramfs-tools
ii initramfs-tools-core 0.133ubuntu13 all generic modular initramfs generator (core tools)
ii libklibc:amd64 2.0.7-1ubuntu5 amd64 minimal libc subset for use with initramfs