I just registered to paypal sandbox in order to use digital goods feature on my website. I did all the steps required for registering and for creating an express checkout form through the paypal integration wizard (https://www.paypal-labs.com/integrationwizard/)
My problem is now when I click the pay with paypal button I get a pop up screen saying:
Proxy Error
The proxy server received an invalid response from an upstream server. The proxy server could not handle the request GET >/webapps/checkout/webflow/sparta/expresscheckoutincontextinitflow.
Reason: Error reading from remote server
I hope someone could help me figure this out. The API information I used was taken from my sandbox test account.
Thanks in advance.
