Hi again, 
Aternos! So, as of now, you guys have an outdated, may I add, version of 
FastASyncWorldEdit , or FAWE for short, and is not very compatible with other plugins (e.g.; CoreProtect). So, I have found the new version on Spigot, which is updated more and works better! Here's the link:
https://www.spigotmc.org/resou…ldedit-voxelsniper.13932/
P.S,; Make sure to read "Why you should use it" on the Spigot website (link above)!