My Manjaro won't boot anymore and I get this message: error file /boot/vmlinuz-6.0-x86_64 not found

From there you’ll have to enter a chroot environment using the terminal emulator you’ve got open there.

To enter a chroot environment:

  1. Ensure you’ve got a relatively new ISO or at least one with a still supported LTS kernel. You seem to have this done.

  2. Write/copy/dd the ISO to a USB thumb drive. And this.

  3. When done, boot with the above mentioned USB thumb drive into the live environment. And this.

  4. Once booted, open a terminal and enter the following command to enter the chroot environment:

manjaro-chroot -a

If you have more than one Linux installation, select the correct one to use from the list provided.

If sucessfully done, you should now be in the chroot environment.

But, be careful, as you’re now in an actual root environment on your computer, so any changes you make will persist after a restart and can cause damage.

Once that’s done, you’ll have to sync the system again. I recommend pamac:

pamac upgrade --enable-downgrade --aur --devel

Hope this helps!