its not loading and im getting a wierd colorfull square.

i dont konw what makeing the issues, imusing a costomized verson of Fabulously Optimized-5.10.2 , i added a "few" client side mods- Mouse Tweaks appleskin better adnacments spark Not Enough Animations Sound Physics remastered 3d Skin Layers simple voice chat Configured inventory HUD Terralith nullscape Structory Incendium FPS Reducer BetterF3 CraftPresence controlling ESSENTIAL Mod bobby(disabled) Legendary Tooltips Eating Animation LazyDFU Tectonic Rolling Down in the Deep(disabled0 Do a Barrel Roll CameraOverhaul Presence Footsteps Inventory Sorting Distant Horizons ShulkerBoxTooltip ToolTipFix Freecam replay mod(disabled)