Bug with classreg.l​earning.Fi​tTemplate.​make in fitcdiscr function in standalone app

Hello, I'm trying to make a standalone version of a bunch of matlab scripts & functions. Everything works in my application generated at the end, except a part where I use a discriminant analysis classification. It works fine when I use my script in matlab, but in the standalone app version, I get the following error. What should I do to make it work in my app? See the screen capture below for more information.