title: Unhandled Exception: FormatException: Unexpected character (at character 1) <br />
body: <p>I get the following unhandled exception:</p>
  <blockquote>
  <p>[ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: FormatException: Unexpected character (at character 1)</p>
  <p>E/flutter ( 7717): &lt; br /&gt;</p>
  <p>E/flutter ( 7717): ^</p>
  </blockquote>
  <p>I think the JSON is invalid, but I don't know how to modify it. Can anyone help me?</p>
  <pre><code>String url ='http://192.168.0.177/proto/submit_wo.php';
    var res = await http.post(Uri.encodeFull(url),
    headers: {&quot;Accept&quot;:&quot;applicarion/json&quot;},
    body:{
      &quot;id&quot;: '3' ,
      &quot;status_id&quot;: '1' ,
      &quot;category_id&quot;: selectedCategory.toString() ,
      &quot;title&quot;: titleController.text,
      &quot;description&quot;: description,
    }
    );
  
    print(json.decode(res.body));
  </code></pre>