The relevant error is
---
Setting up initramfs-tools (0.92bubuntu71) ...
update-initramfs: deferring update (trigger activated)
cp: cannot stat `/vmlinuz': No such file or directory
dpkg: error processing initramfs-tools (--configure):
subprocess installed post-installation script returned error exit status 1
Thanks for your report
The relevant error is
---
Setting up initramfs-tools (0.92bubuntu71) ...
update-initramfs: deferring update (trigger activated)
cp: cannot stat `/vmlinuz': No such file or directory
dpkg: error processing initramfs-tools (--configure):
subprocess installed post-installation script returned error exit status 1
Affecting to initramfs-tools