Fatal error: Uncaught Error: Call to undefined function add_action() in /home/clmepl5/public_html/web/app/plugins/ninja-forms/lib/NF_VersionSwitcher.php:9 Stack trace: #0 /home/clmepl5/public_html/web/app/plugins/ninja-forms/lib/NF_VersionSwitcher.php(286): NF_VersionSwitcher->__construct() #1 /home/clmepl5/public_html/web/app/plugins/ninja-forms/ninja-forms.php(15): require_once('/home/clmepl5/p...') #2 {main} thrown in /home/clmepl5/public_html/web/app/plugins/ninja-forms/lib/NF_VersionSwitcher.php on line 9