catch errors in ink promise

app/components/BookBuilder/Chapter/UploadButton.jsx

@@ -21,11 +21,13 @@ export class UploadButton extends React.Component {
     toggleUpload()
 
     convertFile(file).then(response => {
-      // console.log(response)
-      // console.log(chapter)
+      // console.log('response', response)
       chapter.source = response.converted
       update(chapter)
       toggleUpload()
+    }).catch((e) => {
+      // console.log('error', e)
+      toggleUpload()
     })
   }