I've inherited a CiviCRM 5.21.0 install on Wordpress, using Stripe to process membership payments. When a member chooses the "recurring payment" option on signup (Please renew my membership automatically), CiviCRM doesn't accept that as paid and doesn't add them as members. Instead they are listed as
Pending (Incomplete Transaction)
Non-recurring memberships are entered without a problem.
Any help appreciated.