I'm trying to create a mod that adds certain Ottoman units such as the Isarelys to other Middle Eastern factions to give them some form of early line infantry, and I've been following every single tutorial exactly, yet all of my mods either CTD or don't show up at all.

I've created a very quick example of what I'm trying to do. In this packfile, all I've done is try to enable Isarelys for the Persians.

I have no idea what I'm doing wrong. Any help with identifying what I'm doing wrong would be much appreciated.

isarelys_test.zip