Fatal error: Uncaught Error: Call to undefined function switch_to_blog() in /var/www/wordpress-playground/wordpress/content/plugins/simpleshib/simpleshib.php:145 Stack trace:
#0 /var/www/wordpress-playground/wordpress/content/plugins/simpleshib/simpleshib.php(110): SimpleShib->get_initiator_url('https://playgro...')
#1 /var/www/wordpress-playground/wordpress/wp/wp-includes/class-wp-hook.php(298): SimpleShib->authenticate_or_redirect(NULL, '', '')
#2 /var/www/wordpress-playground/wordpress/wp/wp-includes/plugin.php(203): WP_Hook->apply_filters(NULL, Array)
#3 /var/www/wordpress-playground/wordpress/wp/wp-includes/pluggable.php(532): apply_filters('authenticate', NULL, '', '')
#4 /var/www/wordpress-playground/wordpress/wp/wp-includes/user.php(85): wp_authenticate('', '')
#5 /var/www/wordpress-playground/wordpress/wp/wp-login.php(790): wp_signon(Array, true)
#6 {main} thrown in /var/www/wordpress-playground/wordpress/content/plugins/simpleshib/simpleshib.php on line 145