I have changed my v4.master in my SharePoint site now I receive the message:

Unknown server tag 'Publishing Site Action:Site Action Menu'

And I can't see anymore my site.

How can I replace that v4.master with the original one ? (I have the file)

  • 3
    Rule number 1, Never edit a orginal Masterpage, always make a copy. You should be able to use SPD designer to reset the master page to the default definition. Commented Sep 16, 2014 at 9:12
  • 1
    Like @JulianoG said, you should use Sharepoint Designer and there you can browse to your v4.master and reset it to site definition. :) Here is a link that might include some information about the problem: office.microsoft.com/en-us/sharepoint-designer-help/…
    – Tenttu
    Commented Sep 16, 2014 at 9:29

1 Answer 1


How can I replace that v4.master with the original one ?

  • Open SharePoint Designer.
  • Connect to your Site.
  • From Left side > Go to Master Page.
  • Right Click on v4.master > Select Reset to site definition

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