@Hotsauce - I’d advise giving us enough details to help in any way, much unlike you have done so far .
I mentioned the details that would be helpful above:
- A HAR file would be best,
- an x-nf-request-id would be acceptable
- but at a minimum the URL that they can’t reach that we host
However from past experience, if only one user is getting it but your site is working for everyone else, it is almost certainly the case that it is a problem with their network or machine rather than our service, though of course we’ll be happy to investigate once you get us details.