PayPal付款后未记录付款-PayPal IPN + Cloudflare

Question

我正在使用https://github.com/graphpaperpress/Sell-Media，但付款确实有问题。我正在使用cloudflare。 在成功完成贝宝（Paypal）付款后，我被重定向回我的网站到https://example.com/sell-media-thanks/

不幸的是，我可以在这里永远等下去。刷新页面也无济于事。贝宝（Paypal）也说一切都成功了。

在我的 apache日志中，我遇到以下错误：

Apache Error    172.68.65.138   

AH01071: Got error 'PHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\nPHP message: \nPHP message: PHP Warning: array_key_exists() expects parameter 2 to be array, string given in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 551\nPHP message: PHP Warning: Illegal string offset 'num_cart_items' in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/sell-media/inc/class-payments.php on line 555\n'