Acquia Cloud was updated with the following change:

• Acquia Cloud no longer supports the X-Forwarded-Host proxy header by default. Customers that must use the X-Forwarded-Host header for their application can re-enable the header by adding the following code after the Acquia include statement in their settings.php file:

  copy

  $settings['reverse_proxy_host_header'] = 'X_FORWARDED_HOST';