Failed to open URL, Vivaldi browser

[dojamo]

Hi all, Newbie question

Have searched the forums for this error message but found nothing. I don't seem to be able to access anything from within FileZilla Pro, neither getting the pdf manual from the help menu, or connecting to Google Drive, both seem to fail when they try to execute an HTTP call. See attachment. I'm using the Vivaldi browser and suspect it's some kind of app authorization but have no idea how to fix it. Any thoughts?

Thanks
Dominic

[botg]

It looks like your browser isn't registered properly as URL handler for http:// and https:// links.

Try reinstalling your browser (proper install, don't use "portable" packages) and check the Default apps page in Windows' Settings.