I am running forge version 1.16.5 36.1.31 on a server with a lot of mods and when a player refreshes the server list, it sends a long error in the server console. Additionally, the server list displays "Can't connect to server", despite refreshing and actually being able to connect to the server.
here's the links to the logs:
https://gist.github.com/WaffleTraits/83885b1539d5711fabff73a91924e665
https://gist.github.com/WaffleTraits/5ae78e6eaa330422bbc9f7226faf60ce
Here's what's displayed in console when a player refreshes server listing: https://hastebin.com/ativexeyoy.properties
server is running on ubuntu 20.04 and is using java 8 for this forge instance.