Update ArcballControls.js

examples/jsm/controls/ArcballControls.js

@@ -2099,7 +2099,7 @@ class ArcballControls extends Object3D {
 		window.removeEventListener( 'resize', this.onWindowResize );
 		window.removeEventListener( 'keydown', this.onKeyDown );
 
-		this.scene.remove( this._gizmos );
+		if ( this.scene !== null ) this.scene.remove( this._gizmos );
 		this.disposeGrid();
 
 	};