I just reviewed the add a magnet at transfers in the help docs.  The window is slighly different but the magnet string does not wrap into the box.

Ok for that as one long string,  but I cannot 'open' or engage the magnet to download.  The Open tab is greyed out.  What have I missed?

The magnet looks formed ok and was posted public.  Will the magnet fail to engage if the source has been pulled or cannot be found?

Please review the steps of the procedure.