Minecolonies version

Version:
minecolonies-1.12.2-0.10.291-ALPHA-universal
forge version:
1.12.2-forge1.12.2-14.23.5.2836

Expected behavior

Open a GUI, upgrade or interact with the decoration

Actual behaviour

The game crashes with evil intent

crashlog:
https://pastebin.com/GMK7ggMg
serverlog:
https://pastebin.com/e6Ypg1ue

Steps to reproduce the problem

1. Click on a decoration controller
2. Game crashes
   3 ....
3. ... Profit