events.js:183

          throw er; // Unhandled 'error' event

          ^

    TypeError: Cannot read property 'movies' of null

        at Category.findById (E:\PHP\my-move\app\controllers\movie.js:75:26)

        at E:\PHP\my-move\node_modules\mongoose\lib\model.js:4208:16

        at (anonymous function).call (E:\PHP\my-move\node_modules\mongoose\lib\query.js:3128:7)

        at model.Query.Query._completeOne (E:\PHP\my-move\node_modules\mongoose\lib\query.js:1479:12)

        at Immediate.Query.base.findOne.call (E:\PHP\my-move\node_modules\mongoose\lib\query.js:1535:10)

        at Immediate._onImmediate (E:\PHP\my-move\node_modules\mquery\lib\utils.js:119:16)

        at runCallback (timers.js:794:20)

        at tryOnImmediate (timers.js:752:5)

        at processImmediate [as _immediateCallback] (timers.js:729:5)