It sounds like you don't actually have the latest version for some reason. If you enable Settings->Import Settings->Extract PDF Metadata, or you switch Settings->Display Settings->Render Preference to "Speed", does the import suddenly work? If so, you are behind one update. Hopefully you can download the latest update through Google Play, but let me know if that is not the case. To be clear, it was a minor update, so the version number is still 3.8.6 as it was released hours after the original 3.8.6 and I was hoping to catch it before most people got the update so that there wasn't a version number discrepancy between Android, iPadOS and Windows (as that often seems to confuse people).
Mike
Mike