Minecolonies version

Version: Minecraft 1.12.2,
MineColonies 1.12.2-0.10.154-BETA
Structurize 1.12.2-0.10.45-ALPHA

Expected behavior

Deleting text and reentering new values in the Scan Tool GUI From: and To: works if the last character is deleted.

Actual behaviour

Deleting the last character in the field results in the GUI closing and an Invalid Number - Closing! message.

Steps to reproduce the problem

1. Use the Scan Tool to select an area
2. In any of the X, Y,or Z fields, use the backspace key (or Delete key) to delete the existing values.
3. On deleting the last digit, the error occurs.
4. ... Profit

Fixed on structurize side, will be merged into minecolonies soon