Hi saeidg.
I have the exact same problem, but only on macOS apps. On iOS, the .docx, .doc and other formats load just fine. On macOS I get the same error as you have mentioned "WebPageProxy::didFailProvisionalLoadForFrame: frameID = 3, domain = WebKitErrorDomain, code = 102"
My XCode Version is 12.3 (12C33) - the latest available as of now. I got rid of the App sandbox, but that didn't help.
Thanks!
y2345
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