Captivate Prime: Can security settings cause a course not to load?

Hello Captivate Prime Community!

I'm running into an inconsistent issue. It almost seems random, so I wonder if its isolated to my company's network admin's security settings or end user devices. 

Learners are reporting that courses are failing to load all together. Basically they just get the HTML background color or a black screen. Some get a frozen loading symbol. Testing on my end, the course loads fine, but on their end it does not. Usually, after reloading the course several times, closing a few tabs/apps, it will let them in. It is frustrating to say the least.

Its not limited to SWF courses either. It does it on HTML courses as well. Again, seems really random and cannot find a root cause on my end. Courses were created in the most current version of Captivate.

Any feedback or experience with this? Possible security setting or whitelist I need IT to unlock for the Prime site?

Thanks!