@nockdown Taking another look at the pictures I see this is not happening within partimage/partclone but earlier when partitions are being shrunken.
Therefore switching to partclone won’t help you I reckon. I still think it’s good to do if you don’t have a specific reason to use partimage.
For updating to the latest FOS inits run the following commands on your FOG server command shell:
sudo -i
cd /var/www/html/fog/service/ipxe/
mv init.xz init.xz_old
wget https://github.com/FOGProject/fos/releases/latest/download/init.xz
mv init_32.xz init_32.xz_old
wget https://github.com/FOGProject/fos/releases/latest/download/init_32.xz
No reboot of your FOG server needed. Just PXE boot the machine into the task again. If you still run into an error please take a fresh picture and post that here.