Fatal error: Uncaught TypeError: Staff::get_staff_locations(): Argument #1 ($staffId) must be of type int, null given, called in /var/www/vhosts/londondeluxe.co.uk/httpdocs/core/controllers/staff/index.php on line 74 and defined in /var/www/vhosts/londondeluxe.co.uk/httpdocs/core/models/staff/staff.model.php:1514 Stack trace: #0 /var/www/vhosts/londondeluxe.co.uk/httpdocs/core/controllers/staff/index.php(74): Staff->get_staff_locations() #1 /var/www/vhosts/londondeluxe.co.uk/httpdocs/index.php(126): include('...') #2 {main} thrown in /var/www/vhosts/londondeluxe.co.uk/httpdocs/core/models/staff/staff.model.php on line 1514