title: Flutter: Courier has no Unicode support error
body: <p>I'm trying to use a font family NunitoSans &amp; I have to modify a pre existing app. This is what the pubspec.yaml file looks like in terms of the font:</p>
  <pre><code>    flutter:
    fonts:
      - family: NunitoSans
        fonts:
          - asset: fonts/NunitoSans-Regular.ttf
            weight: 600
          - asset: fonts/NunitoSans-ExtraLight.ttf
            weight: 100
          - asset: fonts/NunitoSans-Light.ttf
            weight: 200
          - asset: fonts/NunitoSans-SemiBold.ttf
            weight: 700
          - asset: fonts/NunitoSans-Bold.ttf
            weight: 800
          - asset: fonts/NunitoSans-ExtraBold.ttf
            weight: 900
      - family: OverpassMono
        fonts:
          - asset: fonts/OverpassMono-Regular.ttf
            weight: 600
          - asset: fonts/OverpassMono-Light.ttf
            weight: 100
      - family: AppIcons
        fonts:
          - asset: fonts/AppIcons.ttf
            weight: 500
      
  
    assets:
      - assets/QR.svg
      - assets/welcome_animation.flr
      - assets/send_animation.flr
  </code></pre>
  <p>And this is how I'm trying to use the font. If I put anything other than fonts/NunitoSans-Regualar.ttf I get an error that this font is not present in the desired location.</p>
  <pre><code>final font1 = await rootBundle.load('fonts/NunitoSans-Regular.ttf');
  
  final font2 = await rootBundle.load('fonts/NunitoSans-Regular.ttf');
  </code></pre>
  <p>Any help is appreciated. This is my full error (the link did not help me sorry):</p>
  <pre><code>Courier has no Unicode support see https://github.com/DavBfr/dart_pdf/wiki/Fonts-Management
  
   The font is not in my assets, its like this:
  </code></pre>
  <p><a href="https://i.stack.imgur.com/x3q32.png" rel="nofollow noreferrer">directory</a></p>