I'm using the lightwidget to include instagram posts to my website with an iframe.

Some people have Firefox settings / plugins to block posts from instagram, so they'll get the error: GET https://scontent-frx5-1.cdninstagram.com/v/somepost net::ERR_NAME_NOT_RESOLVED

because the images wont load. Can I somehow catch that error?

I want to show some message instead and display: none; the iframe, so the user doesn't see an endless spinning wheel.

I tried to catch the error like this, but it didn't work:

window.addEventListener('error', function(event) { 
    alert('error')
})

Thanks for any help