Hello, I already had "Override Cache Control headers" option turned on. Can you please explain to me what a "Vary Header" is? How do I identify the Vary headers to add to headers that I want to exclude from caching?
Also, why is this happening all of a sudden? I never had any issues with caching until a few days ago - and had not changed any settings. It seems from the number of help requests related to this same issue - that it may be a systemic issue rather than an individual site issue?