When ever I try to load Minecraft with Create installed it comes up with this error.
I have the following mods installed:
Attribute Fix, AutoRegLib, Biomes O'Plenty, Craft Tweaker, Connected Textures Mod, OpenBlocks Elevator, Mr Crayfish's Furniture Mod, JEI, Journey Map, Lost Cities, Mystical Lib, Ore Excavation, Quark, Ruins, Spice of Life: Carrot Edition, Traverse, Uppers, Water Strainer and Waystones.

I just tried running it on its own, and it was able to load successfully.

Not part of the team, just a random person popping in.
You should try to remove your other mods group by group then 1 by 1 to isolate which one is incompatible, at then the team will able to help you to find what could be the problem with the one mod you found.
(Imagine If everyone just dump all all their mods to the team and ask them what's incompatible)

I have just tested it with my mods, and it is Lost Cities that is causing the error.