Quote:
Cannot find ContentPlaceHolder 'HeadContent' in the master page '/WebSite2/Site.master', verify content control's ContentPlaceHolderID attribute in the content page.
That means you have control which have the property
ContentPlaceHolderID
as
HeadContent
, but unfortunately it is not in the
Master Page.
So, either use correct
ContentPlaceHolderID
, which is in
Master Page or just rename the ContentPlaceHolderID