title: iPhone and iPad return a blank page in browser test on browserstack
body: <p>I'm at the point of testing my website using default browsers on browserstack. All my pages seem okay on all browsers except </p>
  
  <ul>
  <li>iPhone 6 Plus(portrait)</li>
  <li>iPad 4th(portrait)</li>
  <li>Samsung Galaxy Tab 4 10.1(portrait)</li>
  <li>iPhone 5S(portrait)</li>
  </ul>
  
  <p>which are showing a blank for all pages.</p>
  
  <p>I have searched the internet and found that sometimes this may be due to the use of Flash. But I haven't used Flash. The only other info I can find is regarding apps. I just have a fairly standard website. I am stuck now and I don't know where I should be looking for errors. Has anyone else encountered this problem please, am I missing soemthing obvious?</p>