Re-adding podcast by URL gets no response

I have a paid podcast with which I've been having problems for the past month. Intermittently it fails to load new episodes and so I deleted the show and went to re-add using the URL. However, I'm getting no response at all. No error message, no login, no podcast, nothing. I've tried doing it on my iPhone, my iMac, and my MacBook Pro, with the same total lack of result every time. I haven't been able to find any answers in this community or otherwise for what to do when there is no response whatsoever. Please help!