flutter Exception caught by image resource service Invalid argument(s): No host specified in URI file:///

Question

hi everyone I have been working on my application and I want to retrieve an images that I save to firebase storage as it is appears to the photo below

and I use this line of code to retrieve the image from the fire storage

flexibleSpace: FlexibleSpaceBar(
                          background: Image.network(
                              Provider.of<UserModel>(context).bannerImageUrl,
                              fit: BoxFit.cover)),

but the error appears to the title facing me and make my simulator like this

I don't know what is the problem please help;