PayPal standard - IPN verification failing on Joomla 4

[Sobaros]

Joomla 4.2.8
VirtueMart 4.0.12
PHP 8.0

Using the default PayPal plugin, taking payments with PayPal Standard.

Regarding file: /administrator/components/com_virtuemart/plugins/vmpsplugin.php

The above file contains a reference to JSessionStorage (line 1507):

Code Select Expand

$sessionStorage = JSessionStorage::getInstance ($handler, $options);

I believe JSessionStorage was removed in Joomla 4, so its presence in the code causes PHP to raise an error:

Error: Class "JSessionStorage" not found

As a result, IPN verification calls fail when POSTing to /index.php?option=com_virtuemart&view=vmplg&task=notify&tmpl=component&lang=

The above URL returns HTTP 500 status, causing PayPal IPN to repeatedly retry the verification call. However, VirtueMart successfully processes each call, setting orders confirmed and emailing the buyer every time IPN makes its verification attempt.

Is this a known bug, and will it receive a fix?

Is there a workaround to this problem?

Many thanks in advance ...

[jenkinhill]

Repeated emails following a PayPal transaction have been reported by forum members for some time now, not just for J4.

Solutions at the moment include turning off "Check IPN provider IP" in the plugin, code editing to change the way order is status set by PayPal, or the use of an alternate payment plugin that uses webhooks  http://forum.virtuemart.net/index.php?topic=140629.msg534139#msg534139

It is probable that the VM team will develop a new PP plugin to address changes being made by PayPal.