Windchill (in Creo browser) not loading

I am a high school student and my robotics team is using Creo to build our CAD-version robot. I've had two laptops from Catepillar and each one has worked for a bit, then will, for no reason, stop working. I can log on to the server, but then I can't pull up my workspace or the team's cabinets. The browser on load to the point in the picture, then not load any further.

Note: I did try to downgrade to IE 10, but that hasn't fixed the problem.