Pages affected
Description
I am not sure, but it looks like the example of how to disable the Vary header is outdated.
The example is
SilverStripe\Control\HTTP:
vary: ""
But I can see this class has no such attribute.
I think the correct configuration is
SilverStripe\Control\Middleware\HTTPCacheControlMiddleware:
defaultVary:
'X-Forwarded-Protocol': false
Validations