Skins cannot be imported

Hello. I've tried everything, restarted the server, but it simply won't accept the imported skins. And I've seen that the config is incorrect in several places where the ) are missing. In some places, these are then red for me because the opposite is missing. I improved it, but after reloading the plugin, it does it again. And I constantly have the purchasable skins in the list, which is dangerous for me as the server owner. How do I get the skins in that I add myself from the workshop? It just doesn't work for me, and I've tried every version, no chance.