Strange, that means the IPN for a recurring payment came in for a basket that doesn't accept recurring payments. Will review the IPN handling and see if something is going wrong when setting the basket.

If you want to properly test recurring payments, yes. Otherwise Stripe likely can't reach CBSubs properly. I've yet to see anything in code to be causing your issue and have a recurring test IPN that should be arriving in a few hours locally to see what could be going wrong.

Ok, have tested IPN for recurring payments and it worked perfectly fine. I'm not sure what to suggest at this point. I suppose you can cancel the recurring basket and retry with a new basket to see if that helps. Within CBSubs > Subscriptions the subscription should say "Autorecurring with notifications" under "Autorecurring Type' and "Mandatory" or "User Chosen" under "Autorenew Type" for it to be scheduled for recurring payments via IPN. If you can't use IPNs due to needing the site to be offline you'll need to remove the webhook signed signature and just let CBSubs use its internal scheduler, but this will only affect newly created baskets and subscriptions. As is I don't see any issues with recurring payment IPNs.