Fatal error: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, null given in /home/camperva/public_html/test.discovery-motorhomes.co.nz/navigation_responsive.php:18 Stack trace: #0 /home/camperva/public_html/test.discovery-motorhomes.co.nz/navigation_responsive.php(18): array_keys(NULL) #1 /home/camperva/public_html/test.discovery-motorhomes.co.nz/header_responsive.php(258): include_once('/home/camperva/...') #2 /home/camperva/public_html/test.discovery-motorhomes.co.nz/catalogue/interrates.php(19): include('/home/camperva/...') #3 {main} thrown in /home/camperva/public_html/test.discovery-motorhomes.co.nz/navigation_responsive.php on line 18