Problem/Bug Cant build or break anything.

So i'm helping in making a server

And now got an issue with anyone non-op not being able to break or build anything, anywhere.

We just get a message "Sorry, you are not permitted to do that here."

(I do have console access and file access.)

Plugins are as follow:
WorldGuard
WorldEdit
Timber Plugin
EssentialsX
SpawnerSilk
Dynmap
ClearLagg
CoreProtect
Vault
SuperVanish
Buycraft
GroupManager

Huge thanks to anyone who can help me with this!