This is probably a silly question, but I am building a WordPress site on my computer with WAMP to run the necessary back-end- is there anything special I need to do to test Marketpress through checkout?
I have a sandbox account set up and doublechecked the API credentials, making sure it was set to sandbox, but I still get the "There was a problem connecting to PayPal to setup your purchase. Please try again." error. I've turned off all the other plugins and cleared my cookies and such, as the WPMUDev forums had suggested, but no joy.
The cart works fine, the shipping info works fine, then I get a blank page with another "continue checkout" button- I'm assuming this is where you would review your order. Should it be blank?