Same issue here:
Error while running event SchallRadarAlignment::on_player_cursor_stack_changed (ID 36)
BlueprintRecord cannot be read while it is a preview.
stack traceback:
[C]: in function 'is_blueprint_setup'
SchallRadarAlignment/lib/RAlib.lua:441: in function 'is_cursor_blueprint'
SchallRadarAlignment/lib/RAlib.lua:452: in function 'is_cursor_contains'
SchallRadarAlignment/lib/RAgui.lua:253: in function 'refresh'
SchallRadarAlignment/control.lua:80: in function <SchallRadarAlignment/control.lua:78>
4790.072 Error ServerMultiplayerManager.cpp:84: MultiplayerManager failed: "The mod Schall Radar Alignment (2.0.2) caused a non-recoverable error.
Please report this error to the mod author.
Happends when you try to put blueprint from your personal library that was not downloaded into multiplayer game.