Is there an existing issue for this?

• I have searched the existing issues.

Are you using the latest Structurize Version?

• I am running the latest alpha version of Structurize for my Minecraft version.
  I am also running the latest versions of other mods that are part of my problem.

Did you check on the Wiki? or ask on Discord?

• I checked the MineColonies/Structurize Wiki or I asked on discord.

Minecraft Version

1.16

Structurize Version

1.0.418-ALPHA

MineColonies Version (if related bug)

N/A

Related Mods and their Versions

DoubleSlabs 1.16-3.7.3.jar

Current Behavior

When selecting blueprints from the dropdown menu (using the build tool) that use DoubleSlabs entity slabs the game hangs and then crashes. Blueprints using vanilla blocks or a combo of vanilla and modded blocks (not DoubleSlabs) work as intended.

Expected Behavior

Use build tool to place blueprints in creative mode by selecting the blueprint (rendering the preview) and then the green check mark (which will load it into the world).

Reproduction Steps

1. Scan a build (with the scan tool) that utilizes DoubleSlab blocks (two unlike slabs put together).
2. Attempt to place this new blueprint with the build tool.
3. The game will freeze and then crash.

Logs

https://pastebin.com/804VxBZ8

Anything else?

No response

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1.16 is EOL
anyway, this seems to be bug in DoubleSlabs, where they did not adapt to forge API change properly