v9.1.0 wrongly checking a class name that doesn’t exist

  • Resolved dcbuffalo

    (@dcbuffalo)


    1 month, 1 week ago

    This morning, our site suffered a fatal white-screen error, which was focused on the Advanced Product Fields for WooCommerce Extended plugin by Studio Wombat. After reaching out to their support, they believe that your plugin is wrongly checking a class name that doesn’t exist, which is triggering the error in their plugin and causing the fatal site error.

    Here’s the debug message:

    2026-07-11T05:16:32+00:00 Critical Uncaught Error: Failed opening required ‘/home/buffalomusicclub/public_html/wp-content/plugins/advanced-product-fields-for-woocommerce-extended/class-.php’ (include_path=’.:/opt/cpanel/ea-php83/root/usr/share/pear’) in /home/buffalomusicclub/public_html/wp-content/plugins/advanced-product-fields-for-woocommerce-extended/advanced-product-fields-for-woocommerce-extended.php:41

    With additional context:

    { “error”: { “type”: 1, “file”: “/home/buffalomusicclub/public_html/wp-content/plugins/advanced-product-fields-for-woocommerce-extended/advanced-product-fields-for-woocommerce-extended.php”, “line”: 41 }, “remote-logging”: true, “backtrace”: [ “”, “#0 [internal function]: SW_WAPF_PRO_auto_loader(‘SW_WAPF_PRO’)”, “#1 /home/buffalomusicclub/public_html/wp-content/plugins/woo-paypal-gateway/ppcp/includes/compatibility/class-wpg-wapf-compat.php(34): class_exists(‘SW_WAPF_PRO’)”, “#2 /home/buffalomusicclub/public_html/wp-content/plugins/woo-paypal-gateway/ppcp/includes/compatibility/class-wpg-wapf-compat.php(25): WPG_WAPF_Compat->is_active()”, “#3 /home/buffalomusicclub/public_html/wp-content/plugins/woo-paypal-gateway/ppcp/includes/class-ppcp-paypal-checkout-for-woocommerce.php(89): WPG_WAPF_Compat->init()”, “#4 /home/buffalomusicclub/public_html/wp-content/plugins/woo-paypal-gateway/ppcp/includes/class-ppcp-paypal-checkout-for-woocommerce.php(32): PPCP_Paypal_Checkout_For_Woocommerce->define_public_hooks()”, “#5 /home/buffalomusicclub/public_html/wp-content/plugins/woo-paypal-gateway/woo-paypal-gateway.php(118): PPCP_Paypal_Checkout_For_Woocommerce->__construct()”, “#6 /home/buffalomusicclub/public_html/wp-content/plugins/woo-paypal-gateway/woo-paypal-gateway.php(103): run_ppcp_paypal_checkout_for_woocommerce()”, “#7 /home/buffalomusicclub/public_html/wp-includes/class-wp-hook.php(341): init_wpg_woo_paypal_gateway_class(”)”, “#8 /home/buffalomusicclub/public_html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters(NULL, Array)”, “#9 /home/buffalomusicclub/public_html/wp-includes/plugin.php(522): WP_Hook->do_action(Array)”, “#10 /home/buffalomusicclub/public_html/wp-settings.php(622): do_action(‘plugins_loaded’)”, “#11 /home/buffalomusicclub/public_html/wp-config.php(200): require_once(‘/home/buffalomu…’)”, “#12 /home/buffalomusicclub/public_html/wp-load.php(50): require_once(‘/home/buffalomu…’)”, “#13 /home/buffalomusicclub/public_html/wp-blog-header.php(13): require_once(‘/home/buffalomu…’)”, “#14 /home/buffalomusicclub/public_html/index.php(17): require(‘/home/buffalomu…’)”, “#15 {main}”, “thrown” ] }

    This error seems to be related to another topic on your support forum: https://wordpress.org/support/topic/plugin-could-not-be-activated-because-it-triggered-a-fatal-error-770/

    The page I need help with: [log in to see the link]

Viewing 3 replies - 1 through 3 (of 3 total)
  • Plugin Support Jignesh

    (@jigneshmpatel)

    1 month, 1 week ago

    Hi @dcbuffalo,

    Thank you so much — the debug backtrace you provided was exactly what we needed and let us pinpoint the cause immediately.

    You were right: our plugin was checking for a class in a way that triggered Advanced Product Fields for WooCommerce Extended’s autoloader, which then failed and took the site down. We’ve fixed our detection so it no longer triggers any third-party autoloader, and audited the whole plugin for the same pattern. This is released as version 9.1.1.

    Could you please update and confirm it resolves the fatal error on buffalomusicclub.com? You can grab 9.1.1 directly here:

    https://downloads.wordpress.org/plugin/woo-paypal-gateway.9.1.1.zip

    To install:

    Download the ZIP from the link above.
    Go to Plugins → Add New → Upload Plugin, select the ZIP, and click Install Now to update.
    You should now be able to run our plugin alongside Advanced Product Fields without any crash.
    Please let us know here how it goes — and thanks again for the detailed report, it genuinely helped us fix this quickly.

    Best regards

    Thread Starter dcbuffalo

    (@dcbuffalo)

    1 month, 1 week ago

    Thank you! No more crashes, but we have a new problem. Please keep this ticket open as we take a deeper look – I will be back with details….

    Plugin Support Jignesh

    (@jigneshmpatel)

    2 weeks, 6 days ago

    Hello @dcbuffalo,

    I’m closing this ticket now. If you have any further questions or run into any issues, feel free to open a new one — we’ll be happy to assist you.

    Best regards

Viewing 3 replies - 1 through 3 (of 3 total)

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