Title: Internal Server Error Last modified: August 31, 2016 --- # Internal Server Error * Resolved [Masagi](https://wordpress.org/support/users/masagi/) * (@masagi) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/) * Just updated to 4.4.0 and are getting Internal Server Error?? * Please advice * [https://wordpress.org/plugins/woocommerce-quickpay/](https://wordpress.org/plugins/woocommerce-quickpay/) Viewing 15 replies - 1 through 15 (of 21 total) 1 [2](https://wordpress.org/support/topic/internal-server-error-377/page/2/?output_format=md) [→](https://wordpress.org/support/topic/internal-server-error-377/page/2/?output_format=md) * Plugin Author [PerfectSolution](https://wordpress.org/support/users/perfectsolution/) * (@perfectsolution) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962513) * Please enable WP_DEBUG to get the error message(s) * Thread Starter [Masagi](https://wordpress.org/support/users/masagi/) * (@masagi) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962516) * How? 🙂 * Plugin Author [PerfectSolution](https://wordpress.org/support/users/perfectsolution/) * (@perfectsolution) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962517) * [https://codex.wordpress.org/Debugging_in_WordPress](https://codex.wordpress.org/Debugging_in_WordPress) * Thread Starter [Masagi](https://wordpress.org/support/users/masagi/) * (@masagi) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962518) * Also got this after update: ✕ wp_remote_post() failed. PayPal IPN won’t work with your server. Contact your hosting provider. Status code: 500 * Plugin Author [PerfectSolution](https://wordpress.org/support/users/perfectsolution/) * (@perfectsolution) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962519) * > ✕ wp_remote_post() failed. PayPal IPN won’t work with your server. Contact > your hosting provider. Status code: 500 * This is not related to WooCommerce QuickPay. It might be related to the recent WooCommerce update though, or maybe another third party plugin. * Thread Starter [Masagi](https://wordpress.org/support/users/masagi/) * (@masagi) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962520) * Here is error when define(‘WP_DEBUG’, true); Warning: mysqli_real_connect(): Headers and client library minor version mismatch. Headers:100020 Library:100110 in /home/icoveryo/public_html/wp-includes/wp-db.php on line 1488 * Plugin Author [PerfectSolution](https://wordpress.org/support/users/perfectsolution/) * (@perfectsolution) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962522) * That is not related to WooCommerce QuickPay either. It looks like a misconfiguration between your server setup and WordPress. * A quick search brought something like this up: [https://www.howtoforge.com/community/threads/after-mysql-update-headers-and-client-library-minor-version-mismatch.65439/](https://www.howtoforge.com/community/threads/after-mysql-update-headers-and-client-library-minor-version-mismatch.65439/) * I guess you are better off contacting your hosting provider regarding this. * Thread Starter [Masagi](https://wordpress.org/support/users/masagi/) * (@masagi) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962524) * Well updated WooCommerce also and the quickpay.. But I guess it’s time to move back top older WooCOmmerce yet again. :S * Thread Starter [Masagi](https://wordpress.org/support/users/masagi/) * (@masagi) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962525) * Thank you for your feedback. Seems I have a theme error. 🙂 * Plugin Author [PerfectSolution](https://wordpress.org/support/users/perfectsolution/) * (@perfectsolution) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962526) * You are most welcome 🙂 * Thread Starter [Masagi](https://wordpress.org/support/users/masagi/) * (@masagi) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962680) * This is what it says in error log: [20-Jan-2016 08:02:52 UTC] PHP Fatal error: Call to undefined function wcs_order_contains_subscription() in /home/musictom/ public_html/wp-content/plugins/woocommerce-quickpay/classes/woocommerce-quickpay- order.php on line 348 * Plugin Author [PerfectSolution](https://wordpress.org/support/users/perfectsolution/) * (@perfectsolution) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962681) * Sounds like you are using WooCommerce Subscriptions 1.5.x. Version 4.4.0 does not support Subscriptions 1.5.x. You should upgrade to Subscriptions 2.x. * Thread Starter [Masagi](https://wordpress.org/support/users/masagi/) * (@masagi) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962682) * I don’t even know what Subscriptions are. 🙂 * Thread Starter [Masagi](https://wordpress.org/support/users/masagi/) * (@masagi) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962683) * I tried disabling ALL plugin besides WooCommerce and Quickpay. Didn’t help. I tried changing theme more than once, didn’t help either. * Plugin Author [PerfectSolution](https://wordpress.org/support/users/perfectsolution/) * (@perfectsolution) * [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/#post-6962685) * Hi Masagi! * You are most certainly right. That error seems to occur even though you don’t have Subscriptions installed. I will look into this error immediately and update this issue when I have pushed a fix. Viewing 15 replies - 1 through 15 (of 21 total) 1 [2](https://wordpress.org/support/topic/internal-server-error-377/page/2/?output_format=md) [→](https://wordpress.org/support/topic/internal-server-error-377/page/2/?output_format=md) The topic ‘Internal Server Error’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/woocommerce-quickpay_263a40.svg) * [Quickpay for WooCommerce](https://wordpress.org/plugins/woocommerce-quickpay/) * [Support Threads](https://wordpress.org/support/plugin/woocommerce-quickpay/) * [Active Topics](https://wordpress.org/support/plugin/woocommerce-quickpay/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/woocommerce-quickpay/unresolved/) * [Reviews](https://wordpress.org/support/plugin/woocommerce-quickpay/reviews/) * 21 replies * 2 participants * Last reply from: [PerfectSolution](https://wordpress.org/support/users/perfectsolution/) * Last activity: [10 years, 3 months ago](https://wordpress.org/support/topic/internal-server-error-377/page/2/#post-6962695) * Status: resolved