I am writing Swift 5, iOS14.4 and trying to open a PDF from in-app browser (WKWebView).
The PDF is this https://www.travelhealth.gov.hk/english/downloads/files/eHDF_poster_general.pdf
If I open the PDF in Safari as external browser, it works smoothly. However when I use WKWebView oepn it in in-app browser, it doesn't response, nothing happens.
I try to prefix the pdf url with docs.google.com/viewer?url= the url in PDF becomes clickable, but when I click it, it shows me a blank page instead of the destination.
