I'm stuck into a big problem.
I have the very last version of the plugin.
When I finish my paypal payment, I get directly to the thank-you page BUT it gives me this messages
PayPal returned the following status from your payment: INVALID. 38 payment variables were posted.
If this status is not COMPLETED or VERIFIED, then you may need to wait a bit before your payment is approved, or contact PayPal directly as to the reason the payment is having a problem.
If you have any further questions, please contact this site administrator.
I saw on this forum that I'm not the first but I can't find any solution