Raspberry Pi upgrade gone wrong – cannot read file system information for ‘/boot/firmware’: No such file or directory

Today, all of a sudden, our Raspberry Pi gave us the following warning, when running the sudo apt update && sudo apt upgrade:

Setting up raspi-firmware (1:1.20250430-4~bookworm) ...
stat: cannot read file system information for '/boot/firmware': No such file or 
directory
Error: missing /boot/firmware, did you forget to mount it?
dpkg: error processing package raspi-firmware (--configure):
 installed raspi-firmware package post-installation script subprocess returned e
rror exit status 1
dpkg: dependency problems prevent configuration of sense-hat:
 sense-hat depends on raspi-firmware; however:
  Package raspi-firmware is not configured yet.

dpkg: error processing package sense-hat (--configure):
 dependency problems - leaving unconfigured
Processing triggers for initramfs-tools (0.142+rpt4+deb12u3) ...
Errors were encountered while processing:
 raspi-firmware
 sense-hat
E: Sub-process /usr/bin/dpkg returned an error code (1)

As you can see on the following error message:

stat: cannot read file system information for '/boot/firmware': No such file or 
directory

Basically, here is how to fix things:

sudo mkdir -p /boot/firmware
sudo mount --bind /boot /boot/firmware

Then:

sudo dpkg --configure -a

After this, reboot your Raspberry Pi.