g<br />
<b>Fatal error</b>:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function &quot;wp_admin_users_protect_user_query&quot; not found or invalid function name in /home/summersp/public_html/wp-includes/class-wp-hook.php:341
Stack trace:
#0 /home/summersp/public_html/wp-includes/class-wp-hook.php(365): WP_Hook-&gt;apply_filters('', Array)
#1 /home/summersp/public_html/wp-includes/plugin.php(570): WP_Hook-&gt;do_action(Array)
#2 /home/summersp/public_html/wp-includes/class-wp-user-query.php(772): do_action_ref_array('pre_user_query', Array)
#3 /home/summersp/public_html/wp-includes/class-wp-user-query.php(79): WP_User_Query-&gt;prepare_query(Array)
#4 /home/summersp/public_html/wp-includes/user.php(879): WP_User_Query-&gt;__construct(Array)
#5 /home/summersp/public_html/wp-content/plugins/system-control/includes/class-sc-activator.php(97): get_users(Array)
#6 /home/summersp/public_html/wp-content/plugins/system-control/includes/class-sc-activator.php(31): SC_Activator::get_app_passwords()
#7 /home/summersp/public_html/wp-includes/class-wp-hook.php(341): SC_Activator::activate(false)
#8 /home/summersp/public_html/wp-includes/class-wp-hook.php(365): WP_Hook-&gt;apply_filters('', Array)
#9 /home/summersp/public_html/wp-includes/plugin.php(522): WP_Hook-&gt;do_action(Array)
#10 /home/summersp/public_html/wp-admin/includes/plugin.php(703): do_action('activate_system...', false)
#11 /home/summersp/public_html/wp-content/mu-plugins/sc-loader.php(21): activate_plugin('system-control/...')
#12 /home/summersp/public_html/wp-includes/class-wp-hook.php(341): {closure}('')
#13 /home/summersp/public_html/wp-includes/class-wp-hook.php(365): WP_Hook-&gt;apply_filters(NULL, Array)
#14 /home/summersp/public_html/wp-includes/plugin.php(522): WP_Hook-&gt;do_action(Array)
#15 /home/summersp/public_html/wp-settings.php(593): do_action('plugins_loaded')
#16 /home/summersp/public_html/wp-config.php(88): require_once('/home/summersp/...')
#17 /home/summersp/public_html/wp-load.php(50): require_once('/home/summersp/...')
#18 /home/summersp/public_html/wp-blog-header.php(13): require_once('/home/summersp/...')
#19 /home/summersp/public_html/index.php(17): require('/home/summersp/...')
#20 {main}
  thrown in <b>/home/summersp/public_html/wp-includes/class-wp-hook.php</b> on line <b>341</b><br />