Thanks, Mustafa 
— problem solved! I read the documentation you gave me and found that my IP could potentially be the main issue. When I checked the IP I was using for the Kitsu server, I realized I was still using the one from the quick Ayon deployment tutorial.
For some reason, I thought that was my local IP. To fix the problem, I opened the terminal, ran ipconfig, took the IPv4 Address value, and set that as the Kitsu server IP. Now everything’s working 