XF 1.1 Paypal receiving 500 Errors.

[Draike]

http://i.imgur.com/dXZFq.png

I followed Mopquill's instructions (Found here: http://xenforo.com/community/threads/paypal-ipns-returning-500.31736/), but I am still receiving error 500s for valid transactions.


After a call to Paypal, I'm told they're not hitting an Error 500 - but that my software is sending an Error 500 in response, and at this point I am not sure why.

Is this a known issue, and how can I fix it?

 

[Jake Bunce]

Does the request show in the xf_user_upgrade_log table? If yes then there may be a useful error message in there. If no then XenForo never received the callback.