N1ght

Hi there, So my Minecraft forge doesn't respond to any of the things I do to try and exit fullscreen. At first, it was just Forge 1.16.4, but now all of my other Forge downloads are doing the same thing. I've tried going into options and changing the fullscreen there, I tried F11, and I tried changing it in Minecraft's video settings.

Hi there, I've had this issue for the past months or so, and I cannot seem to join back into my modded server. The mods I used are all the same, as well as the mod version (running 1.12.2 14.23.5.2847, Aternos) Whenever I test the mods on a singleplayer world, it works just fine, but when I join my server it says "missing registries: minecraft:dataserializers", is there something I can do to fix this rather than going into 1.13.2?