Hi, the issue is as the title says. I am also including the crashlog for your reference.
How i recreated the crash : place a username logger, then, place a pressure plate on top, then, step on it, then, server crash.

At 1st i thought it has conflict with Minecolonies protection radius, but it still crashes out side of the protection area so i guess it got nothing to do with it.

Custom Modpack : 1.14.4
Server Forge Version : 28.2.10
Mod Version : [1.14.4]+SecurityCraft+v1.8.18.1.jar

crash-2020-06-09_01.14.10-server.txt

Hope this info is sufficient for investigation.