title: Uncaught (in promise) TypeError: t is not a function
body: <p>When I added Image to my classifier for training then it throws some exceptions. We are using the Mobilenet model of ml5.js in which when we call train() method.</p>
  
  <pre><code>    let features =  ml5.featureExtractor('MobileNet');
      const classifier = features.classification();
      console.log("setup classifier DONE", classifier);
  
      var img2;
      console.log("adding images");
      const gorra = new Image();
      gorra.src = "https://ml5js.org/docs/assets/img/bird.jpg";
      gorra.width = 224;
      gorra.height = 224;
      console.log("adding images DONE", gorra);
  
      img2 = new Image();
      img2.src = "{!$Resource.cat}"
      img2.width = 224;
      img2.height = 224;
      console.log(img2);
  
      var img3;
      img3 = new Image();
      img3.src = "{!$Resource.car}"
      img3.width = 224;
      img3.height = 224;
      console.log(img3);
      console.log("setup classifier");
  
      var img4;
      img4 = new Image();
      img4.src = "{!$Resource.car1}"
      img4.width = 224;
      img4.height = 224;
      console.log(img4);
  
      console.log("setup classifier");
      console.log("adding example image...");
      const ex =  classifier.addImage(document.getElementById('imgshow'), "Gorra");
      console.log("adding ex image DONE!...", ex);
      const ex1 =  classifier.addImage(img2, "Gorra");
      console.log("adding ex1 image DONE!...", ex1);
      const ex2 =  classifier.addImage(img3, "car");
      console.log("adding ex1 image DONE!...", ex2);
      const ex3 =  classifier.addImage(img4, "car");
      console.log("adding ex1 image DONE!...", ex3);
      console.log('claasifier'+classifier);
      console.log("Training");
      // const trainer ;
      setTimeout(function(){ const trainer = classifier.train(); console.log("Training DONE", trainer);}, 30000);
  </code></pre>
  
  <p>after adding image whenever train() run it throws this error
  <a href="https://i.stack.imgur.com/LYh7Q.png" rel="nofollow noreferrer">enter image description here</a>
  which is taking reference of Mobilnet.js library, I have highlighted the line where it causes that error
  <a href="https://i.stack.imgur.com/3Wqbc.png" rel="nofollow noreferrer">enter image description here</a> </p>
  
  <p>please let me know, how can we resolve this.</p>