title: Magento 1.9.2.1 upload image issue. Disallowed file format
body: <p>Whenever I try to upload the image, the system throws the error</p>
  <blockquote>
  <p>Disallowed file format.</p>
  </blockquote>
  <p>I have tried a few solutions but nothing worked.</p>
  <p>screenshot</p>
  <p><a href="https://i.stack.imgur.com/iCov5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iCov5.png" alt="enter image description here" /></a></p>