Server Crashing; Error with '/EWG Edit <World>'

[Camadillo Ariodnia]

Plugin version: 8.0.0 Pre-Release 5 (August 22, 2018)

Spigot username: FuzzyWartface

Issue: I'm trying to make some custom biomes with the web panel, but when I go on my server, and type /ewg edit Survival, It says "Generating editor ID", pauses for about 60 seconds, pumps out the error below, then crashes the server.

Link to settings file: This world was never edited, it was made seconds prior to the event.

Link to error log/crash log: https://pastebin.com/ciqegh5f

[Camadillo Ariodnia]

I have tested the same thing on a test server, and it worked perfectly. Anyone know whats causing it?

[Camadillo Ariodnia]

Oh well