Install Hangs at Post-Install Notification window. Can't close!

I have a deployment that works as I expected, but now for some reason it hangs after the install is completed at the Post-Install notification window.

I can’t close it either. If I end the PS process, then SCCM reports the Install as ‘Failed’

I’m new to PS AppDeploy but I’m already starting to question if all this hassle is worth the effort.

Just comment out the Post-Install notification. I never use that personally…