Fatal error: Uncaught Error: Call to undefined method WP_Error::is_error()
in /home/h231566/domains/abzarsahar.com/public_html/wp-content/plugins/ithemes-security-pro/core/modules/site-scanner/class-itsec-site-scanner.php on line 37

Call stack:

1. ITSEC_Site_Scanner::extract_vulnerabilities_from_scan(WP_Error, 0, false)
   wp-includes/class-wp-hook.php:324
2. WP_Hook::apply_filters('', array)
   wp-includes/class-wp-hook.php:348
3. WP_Hook::do_action(array)
   wp-includes/plugin.php:517
4. do_action('itsec_site_scanner_scan_complete', WP_Error, 0, false)
   wp-content/plugins/ithemes-security-pro/core/modules/site-scanner/api.php:86
5. ITSEC_Site_Scanner_API::scan(0)
   wp-content/plugins/ithemes-security-pro/core/modules/malware-scheduling/class-itsec-malware-scheduling-scanner.php:15
6. ITSEC_Malware_Scheduling_Scanner::scan()
   wp-content/plugins/ithemes-security-pro/core/modules/malware-scheduling/class-itsec-malware-scheduling.php:29
7. ITSEC_Malware_Scheduling::run_scan(ITSEC_Job)
   wp-includes/class-wp-hook.php:324
8. WP_Hook::apply_filters('', array)
   wp-includes/class-wp-hook.php:348
9. WP_Hook::do_action(array)
   wp-includes/plugin.php:517
10. do_action('itsec_scheduled_malware-scan', ITSEC_Job)
    wp-content/plugins/ithemes-security-pro/core/lib/class-itsec-scheduler.php:383
11. ITSEC_Scheduler::call_action(ITSEC_Job)
    wp-content/plugins/ithemes-security-pro/core/lib/class-itsec-scheduler-page-load.php:261
12. ITSEC_Scheduler_Page_Load::run_recurring_event('malware-scan')
    wp-content/plugins/ithemes-security-pro/core/lib/class-itsec-scheduler-page-load.php:233
13. ITSEC_Scheduler_Page_Load::run_due_now()
    wp-content/plugins/ithemes-security-pro/core/lib/class-itsec-scheduler-page-load.php:184
14. ITSEC_Scheduler_Page_Load::init('')
    wp-includes/class-wp-hook.php:324
15. WP_Hook::apply_filters(NULL, array)
    wp-includes/class-wp-hook.php:348
16. WP_Hook::do_action(array)
    wp-includes/plugin.php:517
17. do_action('init')
    wp-settings.php:704
18. require_once('/home/h231566/domain...html/wp-settings.php')
    wp-config.php:109
19. require_once('/home/h231566/domain...c_html/wp-config.php')
    wp-load.php:50
20. require_once('/home/h231566/domain...lic_html/wp-load.php')
    wp-blog-header.php:13
21. require('/home/h231566/domain...l/wp-blog-header.php')
    index.php:17