Prerequisites

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

Context

• Minecraft Version: 1.16.5
• MineColonies Version: 0.13.633-ALPHA
• Structurize Version: 0.13.138-ALPHA

Expected behavior

No errors logged.

Actual behavior

Immediately on placing a postbox, the following log messages are shown:

[20:11:43] [Server thread/INFO] [minecolonies/]: Colony 1 - new AbstractBuilding for class net.minecraft.block.BlockState at BlockPos{x=-309, y=64, z=238}
[20:11:44] [Server thread/WARN] [minecraft/TileEntity]: Block entity invalid: minecolonies:colonybuilding @ BlockPos{x=-309, y=64, z=238}
[20:11:44] [Render thread/WARN] [minecraft/TileEntity]: Block entity invalid: minecolonies:colonybuilding @ BlockPos{x=-309, y=64, z=238}

The latter one is also repeated whenever loading a world that contains a postbox. This doesn't happen with a stash.

Other than the log message, it appears to behave as expected, except for a (probably unrelated) UI glitch:

Steps to reproduce the issue

1. Place a postbox.

Logs

Above.

Notes

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