WorldEdit for SpongeAPI

Crash that seems to be being caused by this.

If a player times out using FlexibleLogin the server crashes, citing an exception that seems to be linked to an undefined class in WE?

Printout can be found here

Any aid would be appreciated :slight_smile:

EDIT:

As I backtracked to try an earlier version Iā€™m currently running:
WorldEdit Sponge 1.10.2 - 6.1.5 - Snapshot - dist.jar
Flexible Login 12.3
Sponge API: 5.1.0 Snapshot 323db46
SpongeForge 1.10.2-2171-5.1.0 Beta 1983
MinecraftForge 12.18.2.2111

But the error also occurred on:
Sponge API: 5.1.0 Snapshot 6459642
SpongeForge 1.10.2-2221-5.1.0 Beta 2142
MinecraftForge 12.18.3.2221

Stacktrace