Hats are not appearing in Multiplayer

My modpack: https://www.technicpack.net/modpack/colisaodotempo.933144

Closing all issues as Hats has been rewritten from the ground up and the old mod for a long time now was no longer supported.. I'm sorry I wasn't able to address your issue. If you're still playing modded Minecraft, consider checking out Hats for 1.16.5+.