The base type ‘Microsoft.Office. Project. PWA.PJBaseWebPartPage’ is not allowed for this page

After restoring a PWA Site Collection that has been restored and provisioned successfully. However, when I tried to open the PWA site, I got the following error

The base type ‘Microsoft.Office.Project.PWA.PJBaseWebPartPage’ is not allowed for this page.



This issue usually occurs if you tried to change and customize the default PWA Master Page.


  • Because of you can’t open the PWA site, you should try to open site setting as the following
    • "http://servername/PWA/_layouts/settings.aspx".
  • Below Look and Feel > Click on The Master page.

Look and feel MasterPage

  • Change the current master page with an unmodified Master Page. this will register Microsoft.Office.Project.PWA.PJBaseWebPartPag as safe in the web.config.
    • In my case, the previous master page was “v4_Ad,master” and I change it to “V4.Master” or “nightandday.master” (it must be not changed before).


  • Don’t forget to check “Reset all subsites to inherit this site master page setting”.


  • Now try to navigate to you Project Center that should be worked properly.
  • Again, repeat the above steps to change the default master page to your custom master page that should be now working properly.

Enjoy 🙂

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