So I’ve built a form for external clients to supply their details, and a couple have come back with the same issues, that when they get to this field upload some certificates, they get this “Error: -200, Message: HTTP Error., File:[filename]” error that stops them from proceeding, as it’s a required field.
I’ve tried filling out the form multiple times on my end using different browsers and devices, as well as the exact PDFs that the clients tried to upload, and it’s letting me proceed fine. I’ve found a couple of threads discussing this issue, but they’re all several years old and don’t really have a definitive solution. I’ve seen some people say it may be a server/firewall issue, but I’m lost on what to try next. I’m running Themify Ultra with Wordfence on a PHP8 web server. I do have the Captcha add-on installed for GravityForms, but it’s disabled for this form.
If anyone has any suggestions, then I’d be very grateful for the assistance
