I was playing a two player game, and a second, new player picked up a blueprint from their personal library, a vanilla unmodded game, and it caused the following crash:

The mod Schall Chunk Alignment (2.0.2) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event SchallChunkAlignment::on_player_cursor_stack_changed (ID 33)
BlueprintRecord cannot be read while it is a preview.
stack traceback:
[C]: in function 'is_blueprint_setup'
SchallChunkAlignment/lib/CAlib.lua:70: in function 'is_cursor_blueprint'
SchallChunkAlignment/lib/CArender.lua:211: in function 'is_chunk_showing'
SchallChunkAlignment/lib/CArender.lua:220: in function 'check_cursor_stack_changed'
SchallChunkAlignment/control.lua:53: in function <SchallChunkAlignment/control.lua:51>