Hold on, I just fixed it. As it turns out, the server resource pack I had set was causing some error. I removed it on a whim and it just worked. I don't know why it would, but thanks for the help guys.
It keeps giving me a "serverlevel2 is null" error, https://pastebin.com/XFYT28aD. I've tried deleting "forge-server.toml" and the "serverconfigs" folder in my world but it doesn't seem to work. My server was running fine until it crashed randomly yesterday but I don't know if that has anything to do with it.