Troubles with world gen and structure sets.

Hello! I have scoured the internet rigorously for help with this issue, however, there is literally no documentation or forum responses regarding this specific issue. When I try to load the world with my datapack, it fires the error No key separation in MapLike[{"type":"minecraft:random_spread","salt":19011220,"spacing":5,"seperation":32}]
Was wondering if any more experienced members of the datapack community could help me out. 
P.S (Here is my logs if you wanted more info on what's going wrong. https://mclo.gs/EAVUhRJ )