Server Error in '/' Application.

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: The file '~masterurl/custom.master' is not a valid master page.

Source Error:


Line 1:  <%@ Page Language="C#" masterpagefile="~masterurl/custom.master" title="Untitled 1" inherits="Microsoft.SharePoint.WebPartPages.WebPartPage, Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" meta:progid="SharePoint.WebPartPage.Document" %>
Line 2:  <%@ Register tagprefix="WebPartPages" namespace="Microsoft.SharePoint.WebPartPages" assembly="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
Line 3:  <%@ Register tagprefix="SharePoint" namespace="Microsoft.SharePoint.WebControls" assembly="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

Source File: /sites/gcreeder/gcreeder2016/Pages/Registration.aspx    Line: 1


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.4087.0