Problem is with automapper configuration in "AdminMapperConfiguration.cs" we need to add an ignore to AzureCacheControlHeader.
cfg.CreateMap<MediaSettingsModel, MediaSettings>()
.ForMember(dest => dest.ImageSquarePictureSize, mo => mo.Ignore())
.ForMember(dest => dest.AutoCompleteSearchThumbPictureSize, mo => mo.Ignore())
.ForMember(dest => dest.AzureCacheControlHeader, mo => mo.Ignore());
Does anyone has same problem ?