Support » Fixing WordPress » [Plugin: s2Member ( Membership w/ PayPal® Integration ) also works w/ BuddyPress] Unable to post VA

  • After paying through paypal and click return to merchant the following message comes up

    “Error: Unable to verify POST vars. Please contact Support for assistance. … This is most likely related to an invalid PaypalA configuration … Check: PDT / Auto-Return.”

    This occurs every time I tried to subscribe to the website as a member.

    The plugin was working fine until I updated to 2.8.9.

    Now it doesn’t seem to work at all.

    Anyone got a solution.

    Please help.


Viewing 5 replies - 1 through 5 (of 5 total)
  • Thanks for reporting. This has been tested in v2.8.9, and is working correctly. If you’re still getting this error, please try this:

    1. Triple-check your PayPal/Auto-Return configuration. Log into your PayPal Account, and go to: Profile -> Website Payment Preferences. Turn Auto-Return on, and ALSO enable PDT ( Payment Data Transfer ). Both of these features should be turned on. Once you’ve turned these on, PayPal will give you an Identity Token for PDT. You’ll need to copy/paste your Identity Token into the s2Member -> PayPal Options panel.

    2. Are you in Sandbox testing mode? If so, is your PayPal Email Address configured with a Sandbox address, or with your real PayPal Email Address? When doing Sandbox tests, you MUST have a Sandbox Business account configured for s2Member, and not your real PayPal address.

    3. If you are Sandbox testing, make sure that you generated your PayPal Button Codes after you turned Sandbox mode on. If you’re Sandbox testing, using Button Codes that were generated for a live site, you will have problems.

    Please report back if possible. I’m happy to assist.

    We finally tracked this down. v2.9.2+ fixes this:

    Thanks for that, the new version fixes the whole thing.


    Just wanted to leave a message pointing out how great the customer support is for this product. Jason went above and beyond to get our install working exactly how we needed. No issues with S2, it was something with our server and PHP mail flags, but Jason came up with a work around that did the trick.

    Thanks again for all the help and the quick replies to questions. Awesome product, keep up the good work.


    Great to hear. Thanks for the kudos! ~Very welcome.

Viewing 5 replies - 1 through 5 (of 5 total)
  • The topic ‘[Plugin: s2Member ( Membership w/ PayPal® Integration ) also works w/ BuddyPress] Unable to post VA’ is closed to new replies.