Weird. I fixed it and it's accessible on internal network, but when I try to access external with Nginx Proxy Manager as my reverse proxy, it won't work.
I still have it redirecting to http://[internal IP]:5055 on the proxy manager.
Sigh.
EDIT: Further testing reveals that my entire reverse proxy is screwed up for some reason, will try and fix that first.
EDIT2: OH MY GOD, my freakin ISP changed my IP and all it took was to restart my router. Everything works now. Sorry, I'm just dumb lol.