It appears they are missing the 'r' at the end for the colored series.

[15:59:33] [Worker-ResourceReload-9/ERROR]: [Load My Fucking Tags] Couldn't load certain entries with the tag epicsamurai:armors/gem_samurai_armor_chestplate_master: epicsamurai:red_samurai_chestplate_maste (from epicsamurai-0.0.42-1.20.1-neo.jar), epicsamurai:blue_samurai_chestplate_maste (from epicsamurai-0.0.42-1.20.1-neo.jar), epicsamurai:gray_samurai_chestplate_maste (from epicsamurai-0.0.42-1.20.1-neo.jar), epicsamurai:green_samurai_chestplate_maste (from epicsamurai-0.0.42-1.20.1-neo.jar)

I fixed it