with Directory not working

[bekusmanov]

/storage/emulated/0/Android/data/com.ovr.ovrPerformance/cache/videoName.mp4

                    String path = await FlutterScreenRecording.stopRecordScreen;

                      await _trimmer.loadVideo(videoFile: File(path));


                    await _trimmer
                        .saveTrimmedVideo(startValue: 2240.0789610389534, endValue:9756.0,
                        onSave: (String? outputPath) async {
                      await context.pushNamed(
                        'VideoRecored',
                        queryParameters: {
                          'videoPath': serializeParam(
                            outputPath,
                            ParamType.String,
                          ),
                        }.withoutNulls,
                      );


                    })
                        .then((value) {

                    }).catchError((onError){
                      print(onError.toString());
                    });

this my code outputs return null