We have a vendor installed site on a local server in IIS. They said the site only works in Chrome. The site allows tickets to be printed by clicking a button called "PDF" which then generates and downloads a PDF. For some tickets it works and others get "Failed - Network error". It's not random, the same ticket either works every time or doesn't. We can download those same tickets that don't work in Chrome, in Edge and Firefox without issue. But Edge and Firefox have other view issues so we can't just switch to them. Everything else within this site works fine in Chrome. We've already tested disabling AV, UTM services, etc. Those had no affect. I'm thinking this issue lies in IIS or the code of the site.