Prerequisites

• [x ] I am running the latest alpha version of MineColonies and Structurize for my Minecraft version.
• [ x] I checked the MineColonies/Structurize wiki and made sure my issue is not covered there.
• [ x] I made sure that this issue is not a duplicate of any existing issue.

Context

• Minecraft Version: 1.15.2
• MineColonies Version: 0.13.159
• Structurize Version: 0.13.42

Problem description

Server crashes when client tries to connect.

Notes or related things

crash-2020-08-20_17.35.52-server.txt

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