Changing user role

Hi there,
I did this thing that was finally working just fine on my demo site, but when I moved site to live it no longer works? No settings were touched, anyway when someone submits a formidable form I want to change the user role and after trying a whole bunch of things this was actually working:

//Onboarding - page 1 obp1
add_action('frm_after_create_entry', 'update_user_role', 10, 2);
function update_user_role_obp1($entry_id, $form_id){
    if ( $form_id == 8 ) {
        
        $userid = $_POST['item_meta'][13]; //1775 is the ID of the userID field
        $role = $_POST['item_meta'][14]; // 1134 is the ID of the role dropdown
            
        if ( $userid && $role ) {
            
            $user = get_userdata( $userid );
            $user->set_role( 'um_obp1' );

            global $ultimatemember;
            global $user_ID;
            $user_id = get_current_user_id();
            um_fetch_user( $user_id );
            $role_slug = 'um_obp1';
            $ultimatemember->user->set_role('um_obp1');
            UM()->roles()->set_role( $user_id, $role_slug );
            UM()->roles()->set_role_wp( $user_id, $role_slug );
            UM()->user()->remove_cache( $user_id );
                                }
                         }
}

DO you have any idea why it would stop working after transferring the site?