Fatal error: Uncaught Error: Call to undefined function add_action() in /home/rcas/sites/rcas.org/releases/20240530164147/web/app/mu-plugins/network-username-restrictions-override.php:25 Stack trace: #0 /home/rcas/sites/rcas.org/releases/20240530164147/web/app/mu-plugins/network-username-restrictions-override.php(239): NetworkUsernameRestrictionsOverridePlugin->__construct() #1 {main} thrown in /home/rcas/sites/rcas.org/releases/20240530164147/web/app/mu-plugins/network-username-restrictions-override.php on line 25