Thank you so much for that added context, @FishersPopcorn .
Is there any chance you share the same ISP (Internet Service Provider) in the same region? That can sometimes be a factor in seeing localized errors to help further diagnose what may be the problem.
Regardless, I invite you to check out this tutorial on diagnosing Theme Issues and how to resolve app and code related occurrences.
I do hope that can shed further light, but in the meantime I also invite the rest of our community members to offer their troubleshooting steps as well as testing your site.
Warm regards,