I have macOS Sierra 10.12.3, and upgraded to Brave 0.15.0 earlier today. Since the upgrade, when I click to download or view a PDF, I will get a brief flash of the normal page structure for showing a PDF before the tab goes all black with the error image in the center, as in the attached screenshot. I cannot use the back button, even though it’s the same tab I tried to open the PDF from. Nor can I leave that page for another page in the tab by typing in a different URL - I have to open a new tab to do whatever.
I can download the PDF’s via Safari from the same sites, and so far this has happened on 3 different sites