Actually I hate to dig out old threads... but this one is indeed the only one I was able to find on the net for this very problem...
It's the same problem for me, be it here in the office or at home... most downloads do work, but even downloading a simple PDF from a parcel service results in opening the download side panel and nothing happens.
I switched to Opera for quite a long time because from time to time Vivaldi refused to download, but tried Vivaldi again from time to time.
Now, that I found this thread, I hope there are others out there with the same problem and probably a solution.
I ran Vivaldi as Admin, I changed the Download-folder (to c:\downloads and then back to my standard profile-folder), uninstalled Vivaldi, installed it - no way.
Certain downloads do not work, others do: right this morning I downloaded several (big zipped) files from Google-Drive with no problem.
Now, I wanted to download a PDF from the parcel-service and... nothing (see above).
System: Windows 10, 21H1, i5-processor with 8 Gigs of RAM. Avast antivirus running in the background.
I would really like to be Vivaldi my "last and forever browser" but this download issue keeps me from that... this is really annoying.
Could somebody help me with this - please? 🙂
Marc / controlport2
edit: I also have the default download drawer selected.