The Ribbon Tab with id: "Ribbon.Read" has not been made available for this page or does not exist.
Use Ribbon.MakeTabAvailable().
使用SharePoint自带的弹窗，有时候会遇到这种问题。
大多数情况下，这种问题的主要原因是因为弹出的页面类型是WikiPage，把页面类型改为WebPart即可。
The Ribbon Tab with id: "Ribbon.Read" has not been made available for this page or does not exist.
原文：http://www.cnblogs.com/wanren/p/4632399.html