Admin pages not looking or working right
There are three main things that we’ve seen cause this:
The theme you’re using may be causing trouble and you can test this simply changing to the default theme for a moment and reloading the admin page you’re having trouble with.
Some plugins have also been known to conflict in a way that may cause the s2Member admin pages to not work correctly.
To test these, just deactivate them all and reload the page, or deactivate them one by one and check after each if the problem is gone.
Try changing back to the default index.php file and reload the admin page.
If the above don’t solve the problem, there are a couple more things you could try. Please see this article: Troubleshooting Tips
Unable to Verify $_POST Vars Error
There are two main things to try when fixing this error:
This script will help spot some known server issues that would cause you this error. Knowledge Base » s2Member Server Scanner
Follow the instructions in that article to spot these issues, and follow the advice given to solve each until you get an all-green report.
That setting would cause this error if it’s missing or incorrect. Please verify that your PDT configuration is correct. Dashboard -› s2Member -› PayPal Options -› PayPal PDT Integration
After fixing each one, do a new test purchase to see if the error is gone.
If you continue having this issue, try these other tips to help solve the issue: Knowledge Base » Common Troubleshooting Tips