Thumbnail of the video is not showing

Hello, I made custom controls on the video player. The problem is that I added a thumbnail in order to play the clip, the button must be pressed. The problem is that in debug mode it works without problems, but when I upload it, it does not load. Here is the code

// Automatic FlutterFlow imports
import '/backend/backend.dart';
import '/flutter_flow/flutter_flow_theme.dart';
import '/flutter_flow/flutter_flow_util.dart';
import '/custom_code/widgets/index.dart'; // Imports other custom widgets
import '/flutter_flow/custom_functions.dart'; // Imports custom functions
import 'package:flutter/material.dart';
// Begin custom widget code
// DO NOT REMOVE OR MODIFY THE CODE ABOVE!

import 'package:video_player/video_player.dart';
import 'package:chewie/chewie.dart';

class CustomVideoPlayer extends StatefulWidget {
  const CustomVideoPlayer({
    Key? key,
    this.width,
    this.height,
    required this.videoUrl,
    required this.thumbnailUrl,
    required this.progressBarColor,
    this.borderRadius = 32,
  }) : super(key: key);

  final double? width;
  final double? height;
  final String videoUrl;
  final String thumbnailUrl;
  final Color progressBarColor;
  final double borderRadius;

  @override
  State<CustomVideoPlayer> createState() => _CustomVideoPlayerState();
}

class _CustomVideoPlayerState extends State<CustomVideoPlayer> {
  late VideoPlayerController _controller;
  late ChewieController _chewieController;
  bool _isPlaying = false;

  @override
  void initState() {
    super.initState();
    _controller = VideoPlayerController.network(widget.videoUrl);
    _chewieController = ChewieController(
      videoPlayerController: _controller,
      autoPlay: false,
      looping: false,
      aspectRatio: 16 / 9,
      allowFullScreen: true,
      allowMuting: true,
      autoInitialize: false,
      showControls: false,
      materialProgressColors: ChewieProgressColors(
        playedColor: widget.progressBarColor,
        handleColor: widget.progressBarColor.withOpacity(0.5),
        bufferedColor: widget.progressBarColor.withOpacity(0.5),
        backgroundColor: Colors.transparent,
      ),
    );

    _controller.addListener(() {
      setState(() {});
    });
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      width: widget.width,
      height: widget.height,
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(widget.borderRadius),
        image: DecorationImage(
          image: NetworkImage(widget.thumbnailUrl),
          fit: BoxFit.cover,
        ),
      ),
      child: ClipRRect(
        borderRadius: BorderRadius.circular(widget.borderRadius),
        child: Stack(
          children: [
            Center(
              child: GestureDetector(
                onTap: () {
                  setState(() {
                    _isPlaying = true;
                    _initializeAndPlayVideo();
                  });
                },
                child: _isPlaying
                    ? Chewie(controller: _chewieController)
                    : Container(), // Use an empty container here
              ),
            ),
            if (!_isPlaying)
              Center(
                child: IconButton(
                  icon: Icon(Icons.play_arrow),
                  onPressed: () {
                    setState(() {
                      _isPlaying = true;
                      _initializeAndPlayVideo();
                    });
                  },
                ),
              ),
          ],
        ),
      ),
    );
  }

  void _initializeAndPlayVideo() {
    _chewieController = ChewieController(
      videoPlayerController: _controller,
      autoPlay: true,
      looping: false,
      aspectRatio: 16 / 9,
      allowFullScreen: true,
      allowMuting: true,
      autoInitialize: true,
      showControls: true,
      materialProgressColors: ChewieProgressColors(
        playedColor: widget.progressBarColor,
        handleColor: widget.progressBarColor.withOpacity(0.5),
        bufferedColor: widget.progressBarColor.withOpacity(0.5),
        backgroundColor: Colors.transparent,
      ),
    );
    setState(() {});
  }

  @override
  void dispose() {
    _controller.pause();
    _controller.dispose();
    _chewieController.dispose();
    super.dispose();
  }
}
1