I have been using the Bittorrent Web Client with no problems for about a year. Now I'm trying to add a new torrent and nothing happens when I click on the "Add Torrent +" button. I've tried many times and sometimes the window with the torrent details will open (twice out of about 10 attempts) but then nothing happens when I try to start the download.
The buttons to delete old torrents are also non-responsive, as are the Help and Settings buttons at the top. It seems that the only thing I can do is select my current torrents and show the files in Finder (I'm using a Mac, OS is Mojave 10.14.6). I upgraded Bittorrent this morning as I thought that might be the problem but it's made no difference.