I have IPN (Paid Subscriptions) problems since a long time ago (almost 2 years).
But is time now to fix this issue for good.
Everything is ok regarding setup (Server Side - WBB - Paypal IPN)
But never any transaction completed successfully.
Always I received this Error status from IPN messaging .
Always HTTP response code 500 ....
Is the IPN Message valid and the format is correct ?
I have a miss-configuration in IPN ?
BTW my Notification URL seems to work fine and waiting IPN messages to arrive from Paypal.
Notification URL => https://xiaomi-miui.gr/community/index.php/PaypalCallback/
Help needed my friends because I have to add manually all the transactions, but the problem is HUGE now, because I can't continue this way.
We have more than 30k members now, and is impossible to do it this way.
Thanks in advance for your help.