Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/antenaserwis/public_html/antenylodz/wp-content/plugins/ithemes-security-pro/core/modules/system-tweaks/class-itsec-system-tweaks.php:40 Stack trace: #0 /home/antenaserwis/public_html/antenylodz/wp-content/plugins/ithemes-security-pro/core/modules/system-tweaks/class-itsec-system-tweaks.php(10): ITSEC_System_Tweaks->add_hooks() #1 /home/antenaserwis/public_html/antenylodz/wp-content/plugins/ithemes-security-pro/core/modules/system-tweaks/class-itsec-system-tweaks.php(15): ITSEC_System_Tweaks->__construct() #2 /home/antenaserwis/public_html/antenylodz/wp-content/plugins/ithemes-security-pro/core/modules/system-tweaks/class-itsec-system-tweaks.php(117): ITSEC_System_Tweaks::get_instance() #3 /home/antenaserwis/public_html/antenylodz/wp-content/plugins/ithemes-security-pro/core/modules/system-tweaks/deactivate.php(3): require_once('/home/antenaser...') #4 {main} thrown in /home/antenaserwis/public_html/antenylodz/wp-content/plugins/ithemes-security-pro/core/modules/system-tweaks/class-itsec-system-tweaks.php on line 40