Flutter: why my app started throwing exception?

Question

Hello
I am working with the VideoPlayer plugin, everything is working good till before but now it started throwing this exception.
** _AssertionError ('package:flutter/src/services/message_codec.dart': Failed assertion: line 111 pos 15: 'code != null': is not true.) ** More Detail: Log:
The video player initializing code is as follows:

  @override
  void initState() {
    super.initState();
      _videoController =VideoPlayerController.asset("assets/videos/video_1.mp4")
      ..initialize().then((value) {
       _videoController.play();
        setState(() {
          
          isShowPlaying = false;
        });
      });

      
  }

Any kind of help will be highly appreciated!