"XMLHttpRequest error."

I’m new to flutter development
I am creating an API with laravel in order to connect to my database to retrieve the data.
But I’m not narrating how to get the data
But in postman it works very well. Do I have to configure before it works?
Please help me

I have only one exception
“XMLHttpRequest error.” that I don’t understand.

i need your help

When I compile my project it sends me to the browser_client.dart file at line 90
return await completer.future;