Minecolonies version

version X.X.XXXX or curse X.X.XX
minecolonies-universal-1.12.2-0.8.7686

Expected behavior

• Does NOT crash when upgrading town Tall L2 to L3. Birch Medieval.

Actual behavior

• Crashes

Thread: Client thread
Java.lang.NullPointerException: Unexpected error
at com.minecolonies.coremod.client.gui.WindowTownHall$8.updateElement(WindowTownHall.java:850)

Steps to reproduce the problem

1. Town Hall at L2
2. Upgrade to L3
3. Crashes hard - to desktop
4. Reload client (server is OK
5. Click Town Hall book
6. Instant Crash

Other details

• Archiving the world and preserved a few 15 minute snapshots
• Note keeping work that crashed above and just regressing to my prior MC
• Shut down server and restored prior MC : minecolonies-universal-1.12.2-0.8.7637 to client and server
• Started server, launched client connected
• Clicked Town hall book -- all OK
• Town hall was marked as being upgraded
• Builder started to process
  fml-client-2.log

Please update to the latest alpha, there has been a hotfix pushed to fix this error.

Confirmed: As a test I restored my prior world that crashed, updated the MC to (minecolonies-universal-1.12.2-0.8.7688) and everything worked.

Thank you