This plugin don't be workin

Traincarts isn't installing correctly for me. I've tried everything, my server was offline, and I've even tried reinstalling spigot. I am on 1.14.4. When I get it it installs, gives me the check mark, but doesn't appear in my files. I've been trying to get it to work for 5 hours now, and I would really appreciate it if this could be fixed asap. thx!

thx