Title: PHP error
Last modified: August 23, 2022

---

# PHP error

 *  [Gabriel](https://wordpress.org/support/users/mrgkanev/)
 * (@mrgkanev)
 * [3 years, 9 months ago](https://wordpress.org/support/topic/php-error-539/)
 * Hi,
    When using PHP 8.0 the plugins starts throwing these errors all the time:
 *     ```
       2022-07-28T03:05:21+00:00 CRITICAL Uncaught TypeError: openssl_free_key(): Argument #1 ($key) must be of type OpenSSLAsymmetricKey, bool given in /home/user/domains/website/public_html/wp-content/plugins/mypos-virtual-for-woocommerce/includes/class-wc-gateway-ipc.php:547
       Stack trace:
       #0 /home/user/domains/domain/public_html/wp-content/plugins/mypos-virtual-for-woocommerce/includes/class-wc-gateway-ipc.php(547): openssl_free_key()
       #1 /home/user/domains/domain/public_html/wp-content/plugins/mypos-virtual-for-woocommerce/includes/class-wc-gateway-ipc.php(714): WC_Gateway_IPC->is_valid_signature()
       #2 /home/user/domains/domain/public_html/wp-content/plugins/mypos-virtual-for-woocommerce/includes/class-wc-gateway-ipc.php(831): WC_Gateway_IPC->check_payment_status()
       #3 /home/user/domains/domain/public_html/wp-content/plugins/mypos-virtual-for-woocommerce/includes/class-wc-gateway-ipc.php(8): WC_Gateway_IPC->check_pending_payment_orders_statuses()
       #4 /home/user/domains/domain/public_html/wp-includes/class-wp-hook.php(307): mypos_check_pending_payment_orders_statuses()
       #5 /home/user/domains/domain/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()
       #6 /home/user/domains/domain/public_html/wp-includes/plugin.php(524): WP_Hook->do_action()
       #7 /home/user/domains/domain/public_html/wp-cron.php(138): do_action_ref_array()
       #8 {main}
         thrown в /home/user/domains/domain/public_html/wp-content/plugins/mypos-virtual-for-woocommerce/includes/class-wc-gateway-ipc.php на ред 547
       ```
   

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## Tags

 * [errors](https://wordpress.org/support/topic-tag/errors/)
 * [php](https://wordpress.org/support/topic-tag/php/)

 * 0 replies
 * 1 participant
 * Last reply from: [Gabriel](https://wordpress.org/support/users/mrgkanev/)
 * Last activity: [3 years, 9 months ago](https://wordpress.org/support/topic/php-error-539/)
 * Status: not resolved