There was a problem processing your membership or payment was not successful
I am getting this message when using PayPal Sandbox, when you retunr from PayPal to the site:
There was a problem processing your membership or payment was not successful. This error can also occur if you refresh the payment confirmation page. If you believe your order was not completed successfully, please contact the site administrator.
Can someone help me resolve this please.
I have membership packs set up according to the tutorial.