Minecolonies version

Version: 1.12.2-0.10.143alpha

Expected behavior

• not to crash please

Actual behaviour

• upon trying to find jobs for wat ever reason the game crashes due to a bug in minecolonies and has happened several times

Steps to reproduce the problem

1. load up MC with the 143alpha or possibly later versions
2. have colonists try to find jobs
3. crash

crash-2019-01-20_12.31.22-server.txt
crash-2019-01-20_19.34.21-server.txt
crash-2019-01-20_22.44.39-server.txt
crash-2019-01-21_12.02.11-server.txt
crash-2019-01-21_12.15.23-server.txt

4. ... Profit

Should be fixed