I really recommend installing this update if you used this version or newer: 2.5.3.1 Protection Improvements
2.5.3.3 Protection Hotfix
Only spigot 1.13.1
+ Added update changes checker
This will check for changes in the system
to prevent something like this
[#] Fixed an issue that members of an land
couldn't build etc.
Reported by
@dawars, @Datblock