It seems that first I need to configure my products on Stripe, and I did, but Stripe assigned their own product IDs (like "prod_IzLwun9HsD5Ds9A"). Therfore, I get the same error about no such plan "MEMBERSHIP_PLAN_2".
How can I make that Stripe uses the same product ID as Oxwall (and the membership plugin) does?
Does Strip allows to define your own product IDs? Does this plugin allow you to match both product IDs? If not, how can they match?
thanks