[Flutter] Why can't a Flutter application connect to the Internet when installing...

In debug mode, everything looks good. I get answers and data lists from my API. But after creating app-release.apk and installing it on my phone, there isn't an Internet connection any more.

Here is my code:

ScopedModelDescendant<ReportPosViewModel>(
builder: (context, child, model) {
return FutureBuilder<List<Invoice>>(
future: model.invoices,
builder: (_,
AsyncSnapshot<List<Invoice>> snapshot) {
switch (snapshot.connectionState) {
case ConnectionState.none:
case ConnectionState.active:
case ConnectionState.waiting:
return Center(
child:
const CircularProgressIndicator());
case ConnectionState.done:
if (snapshot.hasData) {
// Something todo
}
else if (snapshot.hasError) {
return NoInternetConnection(
action: () async {
await model.setInvoice();
await getData();
},
);
}
}
},
);
},
),

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