Only Content Controls Allowed directly issue when Deployed via VS2015

Question

Interesting issue. I am creating Page Layouts in Visual Studio 2015 for SharePoint 2016 (with Visual Studio Tools preview 2) and when I deploy the solution in Visual Studio and create a page, I get the "Only Content controls are allowed directly in a content page that contains Content controls."

But when I upload the .aspx file directly into the Masterpage Gallery, it works fine. What could be the issue?

Bismarck

Answer 1

Many times the cause is improper case for the <asp:Content>.

1. Make sure you have used <asp:Content> instead of <asp:content>.
2. Also check your <asp:Content> has correct ContentPlaceHolderID.
3. Check there are no white spaces around <asp:Content>.