Print making problem

[Monoblaster4]

I've been trying to make some prints for a project, but whenever I start the game up the prints don't show up in the add-on menu. Any ideas?

Add-on: https://drive.google.com/file/d/1rg50OsUj65Z00sWnhbaVTbNq-xcjA8hA/view?usp=sharing

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[thegoodperry]

Belongs in help or mod discussion