Probably the same issue as in T2790, the beam is seen as physical in build mode so "Pick with camera" hits the stabilizer path instead. Followed by a nullpointer as the stabilizer path is not a block.
no intersection found in world currentSegmentContext java.lang.NullPointerException at org.schema.game.common.data.SegmentPiece.set(SegmentPiece.java:334) at org.schema.game.common.data.SegmentPiece.set(SegmentPiece.java:343) at org.schema.game.common.data.SegmentPiece.<init>(SegmentPiece.java:77) at org.schema.game.client.view.gui.advancedbuildmode.AdvancedBuildModeSelection$11$8.pressedLeftMouse(AdvancedBuildModeSelection.java:562) at org.schema.game.client.view.gui.advanced.tools.ButtonResult.leftClick(ButtonResult.java:30) at org.schema.game.client.view.gui.advanced.tools.GUIAdvButton$1.callback(GUIAdvButton.java:28) at org.schema.schine.network.client.GUICallbackController.execute(GUICallbackController.java:65) at org.schema.schine.input.BasicInputController.updateInput(BasicInputController.java:236) at org.schema.game.client.controller.GameClientController.updateStateInput(GameClientController.java:1467) at org.schema.schine.graphicsengine.core.GLFrame.doFrameAndUpdate(GLFrame.java:676) at org.schema.schine.graphicsengine.core.GraphicsContext.mainLoop(GraphicsContext.java:857) at org.schema.schine.graphicsengine.core.GraphicsContext.startUp(GraphicsContext.java:754) at org.schema.game.client.controller.GameMainMenuController.startGraphics(GameMainMenuController.java:1157) at org.schema.game.common.Starter.startMainMenu(Starter.java:1459) at org.schema.game.common.Starter.main(Starter.java:1003) [GLFRAME] THROWN: class java.lang.NullPointerException Now Printing StackTrace