Title: Backend Error
Last modified: September 22, 2025

---

# Backend Error

 *  Resolved [konnektiv](https://wordpress.org/support/users/konnektiv/)
 * (@konnektiv)
 * [9 months ago](https://wordpress.org/support/topic/backend-error-8/)
 * Since some days my sites generate the following error:
 *     ```wp-block-code
       Error Details=============An error of type E_ERROR was caused in line 1221 of the file /var/www/html/wp-content/plugins/wpvulnerability/wpvulnerability-general.php. Error message: Uncaught ValueError: version_compare(): Argument #3 ($operator) must be a valid comparison operator in /var/www/html/wp-content/plugins/wpvulnerability/wpvulnerability-general.php:1221Stack trace:#0 /var/www/html/wp-content/plugins/wpvulnerability/wpvulnerability-general.php(1221): version_compare('2.4.65', '', '')#1 /var/www/html/wp-content/plugins/wpvulnerability/wpvulnerability-software.php(115): wpvulnerability_get_vulnerabilities('apache', '2.4.65', 0)#2 /var/www/html/wp-content/plugins/wpvulnerability/wpvulnerability-software.php(146): wpvulnerability_get_fresh_vulnerabilities('apache')#3 /var/www/html/wp-content/plugins/wpvulnerability/wpvulnerability-software.php(227): wpvulnerability_get_installed('apache')#4 /var/www/html/wp-content/plugins/wpvulnerability/wpvulnerability-run.php(133): wpvulnerability_get_vulnerabilities_clean('apache')#5 /var/www/html/wp-content/plugins/wpvulnerability/wpvulnerability.php(98): wpvulnerability_expired_database_data()#6 /var/www/html/wp/wp-includes/class-wp-hook.php(324): wpvulnerability_plugin_init('')#7 /var/www/html/wp/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)#8 /var/www/html/wp/wp-includes/plugin.php(517): WP_Hook->do_action(Array)#9 /var/www/html/wp/wp-settings.php(727): do_action('init')#10 /var/www/html/wp-config.php(142): require_once('/var/www/html/w...')#11 /var/www/html/wp/wp-load.php(55): require_once('/var/www/html/w...')#12 /var/www/html/wp/wp-admin/admin.php(35): require_once('/var/www/html/w...')#13 /var/www/html/wp/wp-admin/index.php(10): require_once('/var/www/html/w...')#14 {main}  thrown
       ```
   

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Thread Starter [konnektiv](https://wordpress.org/support/users/konnektiv/)
 * (@konnektiv)
 * [9 months ago](https://wordpress.org/support/topic/backend-error-8/#post-18650822)
 * Is there a git repository of this plugin, so I could send a PR to fix this issue?
 *  Plugin Author [Javier Casares](https://wordpress.org/support/users/javiercasares/)
 * (@javiercasares)
 * [9 months ago](https://wordpress.org/support/topic/backend-error-8/#post-18650837)
 * Hello!
 * Yes, you have this one [https://github.com/javiercasares/WPVulnerability](https://github.com/javiercasares/WPVulnerability)
 *  Thread Starter [konnektiv](https://wordpress.org/support/users/konnektiv/)
 * (@konnektiv)
 * [9 months ago](https://wordpress.org/support/topic/backend-error-8/#post-18650851)
 * PR is sent
 *  Plugin Author [Javier Casares](https://wordpress.org/support/users/javiercasares/)
 * (@javiercasares)
 * [9 months ago](https://wordpress.org/support/topic/backend-error-8/#post-18651422)
 * Thank you. New version online!

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Backend Error’ is closed to new replies.

 * ![](https://ps.w.org/wpvulnerability/assets/icon.svg?rev=3387690)
 * [WPVulnerability](https://wordpress.org/plugins/wpvulnerability/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wpvulnerability/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wpvulnerability/)
 * [Active Topics](https://wordpress.org/support/plugin/wpvulnerability/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wpvulnerability/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wpvulnerability/reviews/)

 * 5 replies
 * 2 participants
 * Last reply from: [Javier Casares](https://wordpress.org/support/users/javiercasares/)
 * Last activity: [9 months ago](https://wordpress.org/support/topic/backend-error-8/#post-18651422)
 * Status: resolved