Fatal error: Uncaught Error: Call to undefined function get_site_url() in /homepages/21/d808865509/htdocs/clickandbuilds/Studio/wp-content/plugins/appointment-hour-booking/app-booking-plugin.php:22
Stack trace:
#0 /homepages/21/d808865509/htdocs/clickandbuilds/Studio/wp-settings.php(410): include_once()
#1 /homepages/21/d808865509/htdocs/clickandbuilds/Studio/wp-config.php(87): require_once('/homepages/21/d...')
#2 /homepages/21/d808865509/htdocs/clickandbuilds/Studio/wp-load.php(37): require_once('/homepages/21/d...')
#3 /homepages/21/d808865509/htdocs/clickandbuilds/Studio/wp-blog-header.php(15): require_once('/homepages/21/d...')
#4 /homepages/21/d808865509/htdocs/clickandbuilds/Studio/index.php(17): require('/homepages/21/d...')
#5 {main}
thrown in /homepages/21/d808865509/htdocs/clickandbuilds/Studio/wp-content/plugins/appointment-hour-booking/app-booking-plugin.php on line 22