Is Engine's Error?

[Tom_k]

@vanhaodev

 [PreviewInEditor] Cannot read property 'enabledContactListener' of null
TypeError: Cannot read property 'enabledContactListener' of null
at PhysicsContact.emit (C:\ProgramData\cocos\editors\Creator\3.8.3\resources\resources\3d\engine\bin\.cache\dev\editor\bundled\index.js:194408:21)
at PhysicsContactListener._onPreSolve [as _PreSolve] (C:\ProgramData\cocos\editors\Creator\3.8.3\resources\resources\3d\engine\bin\.cache\dev\editor\bundled\index.js:194831:13)
at PhysicsContactListener.PreSolve (C:\ProgramData\cocos\editors\Creator\3.8.3\resources\resources\3d\engine\bin\.cache\dev\editor\bundled\index.js:277145:18)
at b2PolygonAndCircleContact.Update (C:\ProgramData\cocos\editors\Creator\3.8.3\resources\resources\3d\engine\node_modules\@cocos\box2d\build\box2d\box2d.umd.js:11829:1)
at b2ContactManager.step [as Collide] (C:\ProgramData\cocos\editors\Creator\3.8.3\resources\resources\3d\engine\node_modules\@cocos\box2d\build\box2d\box2d.umd.js:12487:1)
at b2World.Step (C:\ProgramData\cocos\editors\Creator\3.8.3\resources\resources\3d\engine\node_modules\@cocos\box2d\build\box2d\box2d.umd.js:19595:27)
at b2PhysicsWorld.step (C:\ProgramData\cocos\editors\Creator\3.8.3\resources\resources\3d\engine\bin\.cache\dev\editor\bundled\index.js:194619:23)
at PhysicsSystem2D.postUpdate (C:\ProgramData\cocos\editors\Creator\3.8.3\resources\resources\3d\engine\bin\.cache\dev\editor\bundled\index.js:198074:31)
at

hello ,you can modify the emit function by refering to the picture of physics-contact-listener.ts,