Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/rcas/sites/rcas.org/releases/20240530164147/web/app/plugins/user-switching/user-switching.php:52 Stack trace: #0 /home/rcas/sites/rcas.org/releases/20240530164147/web/app/plugins/user-switching/user-switching.php(1292): user_switching->init_hooks() #1 {main} thrown in /home/rcas/sites/rcas.org/releases/20240530164147/web/app/plugins/user-switching/user-switching.php on line 52