Error Loading Course on Apple Products - iPhone, iPad

I have 3 courses that have been live for a few months, and I've continued to have complaints that users are running into issues when trying to open a course created in RISE360 from our LMS site. I have been able to narrow the issue down to Apple. It happens mostly on iPhones and iPads running later versions of iOS, but sometimes on newer versions too. Sometimes the screen will go black, then kick them back to our website and sometimes they will receive a white error message page.

89% of our users are mobile and Apple users make up a good portion of that. What do I need to do to fix this?!?