Hi, I’m using IE version 11. I checked it in Safari and it works fine. It just seems to be IE that is the problem.

Thanks Ismael but how do I regenerate the thumbnails?

Thanks that made the arrows appear on the mobile device.
Is there anything we can do to perhaps bring the arrows in towards the content instead of having them on the far right and left of the browser? Also the arrows seem to be the wrong way around? I would expect the arrow on the left to go forwards through the portfolio items and the right one to go backwards?