My guess is its because wherever Dca.msu is stored that path has a space in it.
I’m struggling with this as well, because it’s getting passed to the command prompt and terminating at the space in the pathway.
Well I think I figured it out on my own. I added a second line of Show-InstllationWelcome after the first.
I removed any CloseApps references from the first instance, and put them all in the second.
This seems to give the correct behavior. The only issue now is that the countdown does not work. Not sure if it’s getting confused because I’ve done a Show-InstallationWelcome call back to back.