ERROR: Unable to verify $_POST vars.

I’ve done some troubleshooting with my site. The transaction goes through PayPal and the email comes through to me

( s2Member / API Notification Email ) – Specific Post/Page ~ Sale

sp_access_url: http://goo.gl/gW89T#www.digitalscrapbookinghq.com
sp_access_exp: 5 years
amount: 14.00
txn_id: 66N01032WN2033535
item_number: sp:4705:43800
item_name: Photobook Perfection video workshop
first_name: Melissa
last_name: Shanhun
full_name: Melissa Shanhun
payer_email: blahblah@gmail.com
user_ip: 203.153.235.29
cv0: http://www.digitalscrapbookinghq.com
cv1:
cv2:
cv3:
cv4:
cv5:
cv6:
cv7:
cv8:
cv9:

Here’s the shortcode
[s2Member-PayPal-Button sp="1" ids="4705" exp="43800" desc="Photobook Perfection video workshop" ps="paypal" lc="" cc="USD" dg="0" ns="1" custom="www.digitalscrapbookinghq.com" ra="14" image="http://www.digitalscrapbookinghq.com/wp-content/uploads/2012/12/snapshot-1.jpg" output="button" /]

URL it’s going to

http://www.digitalscrapbookinghq.com/?s2member_paypal_return=1&tx=66N01032WN2033535&st=Completed&amt=14.00&cc=USD&cm=www%2edigitalscrapbookinghq%2ecom&item_number=sp:4705:43800

Error page

[ http://www.digitalscrapbookinghq.com ] says…
ERROR: Unable to verify $_POST vars.
Please contact Support for assistance.

This is most likely related to an invalid configuration of s2Member, or a problem with server compatibility. If you are the site owner, and you’re absolutely SURE that your configuration is valid, you may want to run some tests on your server, just to be sure $_POST variables are populated, and that your server is able to connect/communicate with your Payment Gateway over an HTTPS connection.

s2Member uses the WP_Http class for remote connections; which will try to use cURL first, and then fall back on the FOPEN method when cURL is not available. On a Windows® server, you may have to disable your cURL extension; and instead, set allow_url_fopen = yes in your php.ini file. The cURL extension (usually) does NOT support SSL connections on a Windows® server.

Please see this thread for details regarding the ideal server configuration for s2Member.
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I’m constantly getting these errors and TXN type errors on my membership plans and just paid to upgrade to Pro in the hope someone will answer my pleas for help!

Thanks in advance

Melissa

Hi Melissa.

Could you do this server test? Knowledge Base » Common Troubleshooting Tips » Server

Let me know how it goes. :)

Yes – I have run the test and all is fine :)

Melissa

Hi Melissa,

Are you running any plugins that could be filtering queries? Can you post a list of the plugins you’re currently running?

Active plugins.

Akismet
AWeber Web Forms
Blubrry PowerPress
Disqus Comment System
Extra Shortcodes for WP eStore
Genesis Simple Edits
Google Analytics for WordPress
Google XML Sitemap for Videos
Google XML Sitemaps
jQuery Collapse-O-Matic
List category posts
My Custom CSS
NextGEN Gallery
Official StatCounter Plugin
Premise
Pretty Link Pro
s2Member® Framework
Sidebar Login
Widget Logic
WordPress Backup to Dropbox
WP Affiliate Platform
WP eStore

Melissa,

Can you try disabling each plugin, and running a test purchase at 0.01? I believe that one of these plugins is casugin the error. My guess would be one of the following has an incompatibility:

AWeber Web Forms
Blubrry PowerPress
Official StatCounter Plugin
Pretty Link Pro

The link in your first post:

http://www.digitalscrapbookinghq.com/?s2member_paypal_return=1&tx=66N01032WN2033535&st=Completed&amt=14.00&cc=USD&cm=www%2edigitalscrapbookinghq%2ecom&item_number=sp:4705:43800

is currently returning the correct value. This link has already been used once and returns this error after it has been used again.

Do you have the full log files for your transactions? If not, enable logging under Dashboard -› s2Member® -› PayPal® Options -› Account Details -› Logging so that we can take a look at the logs and see why this is happening.

Yes I do have logs turned on.

Would it be helpful for me to post one? Where can I find the logs.

I’ll try the 1c transactions this week also

Thanks

The logs can be found in the folder /wp-content/plugins/s2member-logs/. If you post the entries here, please remember to “x” out any private info.