Title: LetsEncrypt Postback SSL Error Last modified: August 31, 2016 --- # LetsEncrypt Postback SSL Error * Resolved [PxO Ink](https://wordpress.org/support/users/pxoink/) * (@pxoink) * [10 years, 1 month ago](https://wordpress.org/support/topic/letsencrypt-postback-ssl-error/) * Hi, * I recently installed LetsEncrypt on a client website who is using WooCommerce with some premium Woo plugins. The certificate is working, and SSL Labs reports no conflicts or issues. * I received an email today with the following errors: * Error Type: Unable to connect to [https://domain.tld/postback.php](https://domain.tld/postback.php) Error Cause: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target * Here’s their system report: * ``` ### WordPress Environment ### Home URL: https://domain.tld Site URL: https://domain.tld WC Version: 2.3.8 WC Database Version: 2.3.8 Log Directory Writable: /home/httpd/html/domain.tld/public_html/wp-content/uploads/wc-logs/ WP Version: 4.2.7 WP Multisite: – WP Memory Limit: 40 MB - We recommend setting memory to at least 64MB. See: Increasing memory allocated to PHP WP Debug Mode: – Language: en_US ### Server Environment ### Server Info: Apache PHP Version: 5.3.6 - We recommend a minimum PHP version of 5.4. See: How to update your PHP version PHP Post Max Size: 32 MB PHP Time Limit: 600 PHP Max Input Vars: SUHOSIN Installed: – MySQL Version: 5.1.73 Max Upload Size: 32 MB Default Timezone is UTC: fsockopen/cURL: SoapClient: DOMDocument: GZip: Remote Post: Remote Get: ### Server Locale ### decimal_point: . thousands_sep: N/A mon_decimal_point: N/A mon_thousands_sep: N/A ### Active Plugins (17) ### LayerSlider WP: by Kreatura Media – 5.3.2 Contact Form 7 - Dynamic Text Extension: by Chris Mavricos SevenSpark – 1.2 Contact Form 7: by Takayuki Miyoshi – 4.1.2 Disable XML-RPC Pingback: by Samuel Aguilera – 1.1 Enhanced E-commerce for Woocommerce store: by Tatvic – 1.0.16 Jetpack by WordPress.com: by Automattic – 3.5.3 Regenerate Thumbnails: by Viper007Bond – 2.2.4 RocketGate Payment Gateway for WooCommerce: by Zedrox – 1.0 Simple Page Sidebars: by Blazer Six – 1.1.8 Theme Junkie Custom CSS: by Theme Junkie – 0.1.3 Theme Junkie Shortcodes: by Theme Junkie – 0.1.2 UpdraftPlus - Backup/Restore: by UpdraftPlus.Com DavidAnderson – 1.10.1 W3 Total Cache: by Frederick Townes – 0.9.4.1 WooCommerce Product Bundles: by WooThemes – 4.9.3 – 4.14.1 is available WooCommerce: by WooThemes – 2.3.8 WooThemes Helper: by WooThemes – 1.5.5 WordPress SEO: by Team Yoast – 2.1.1 ### Settings ### API Enabled: Taxes Enabled: – Shipping Enabled: – Force SSL: Currency: USD ($) Currency Position: left Thousand Separator: , Decimal Separator: . Number of Decimals: 2 ### WC Pages ### Shop Base: #3 - /shop/ Cart: #4 - /cart/ Checkout: #5 - /checkout/ My Account: #6 - /account/ ### Taxonomies ### Product Types: bundle (bundle) external (external) grouped (grouped) simple (simple) variable (variable) ### Theme ### Name: Theme Version: 1.0 Author URL: http://domain.tld Child Theme: Parent Theme Name: FireUp Parent Theme Version: 1.0.1 Parent Theme Author URL: http://www.theme-junkie.com/ WooCommerce Support: ### Templates ### Overrides: theme/woocommerce/archive-product.php fireup/woocommerce/content-product.php fireup/woocommerce/loop/pagination.php fireup/woocommerce/single-product/product-image.php theme/woocommerce/single-product/related.php theme/woocommerce/single-product/review.php theme/woocommerce/single-product/up-sells.php ``` * I’ve been asked to upgrade WordPress, and WooCommerce to their most recent versions within the next two weeks, but I wanted to check on this SSL problem first. * Any help would be greatly appreciated. * [https://wordpress.org/plugins/woocommerce/](https://wordpress.org/plugins/woocommerce/) Viewing 2 replies - 1 through 2 (of 2 total) * Plugin Contributor [Mike Jolley](https://wordpress.org/support/users/mikejolley/) * (@mikejolley) * [10 years, 1 month ago](https://wordpress.org/support/topic/letsencrypt-postback-ssl-error/#post-7271352) * WooCommerce doesn’t use a ‘postback.php’ file – cannot tell you what that is from. * Thread Starter [PxO Ink](https://wordpress.org/support/users/pxoink/) * (@pxoink) * [10 years, 1 month ago](https://wordpress.org/support/topic/letsencrypt-postback-ssl-error/#post-7271354) * Wow Mike! That was a *very* fast reply. Thank you. * Okay, so my guess is that this is from one of the payment processor plugins they use. I’m not familiar with that, so I’ll go research those and take a look. * This error–my guess is this is from a generic Exception handler that WooCommerce uses? Viewing 2 replies - 1 through 2 (of 2 total) The topic ‘LetsEncrypt Postback SSL Error’ is closed to new replies. * ![](https://ps.w.org/woocommerce/assets/icon.svg?rev=3234504) * [WooCommerce](https://wordpress.org/plugins/woocommerce/) * [Frequently Asked Questions](https://wordpress.org/plugins/woocommerce/#faq) * [Support Threads](https://wordpress.org/support/plugin/woocommerce/) * [Active Topics](https://wordpress.org/support/plugin/woocommerce/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/woocommerce/unresolved/) * [Reviews](https://wordpress.org/support/plugin/woocommerce/reviews/) ## Tags * [java](https://wordpress.org/support/topic-tag/java/) * [letsencrypt](https://wordpress.org/support/topic-tag/letsencrypt/) * [SSL](https://wordpress.org/support/topic-tag/ssl/) * 2 replies * 2 participants * Last reply from: [PxO Ink](https://wordpress.org/support/users/pxoink/) * Last activity: [10 years, 1 month ago](https://wordpress.org/support/topic/letsencrypt-postback-ssl-error/#post-7271354) * Status: resolved