Initramfs announces an error that prints a non-existent swap file. Debian installer has an inconvenient installation option to always format the swap file. In Kali KDE and Kubuntu 18.04 deeloper edition, if the swap file changes UUID iniramfs not changes, an error occurs. It's irrelevant that there is a hibernation option in the menu, this error always occurs. The old swap file UUID was registered to /etc/initramfs-tools/conf.d/resume. The UUID swap file in the fstab file is correct.
Update-grub inserts a breeze theme though it is not defined elsewhere in / etc / default / grub.
The definition of a hidden topic that is loaded by update-grub is /etc/default/grub.d/99_breeze-grub.cfg
Please report this issue directly to the bug tracker of your distribution.