add an app page showing loading SharePoint 2013/2016/Online

This SharePoint tutorial, we will discuss how to solve add an app page showing loading error in SharePoint 2013/2016 or SharePoint Online.

add an app page showing loading SharePoint

Currently while working with a SharePoint migration project, while clicking on Add an app, it was showing loading… and it is showing the message forever. Here we will discuss how to resolve this issue. If user trying to click on Settings -> Add an app, it shows loading like below:

add an app page showing loading sharepoint

This was happening in a SharePoint 2013 site which we have migrated from Moss 2007 to SharePoint 2013 by using the database upgrade approach. And here we were designing our own custom master page.

The issue was coming because some content place holders are missing in the SharePoint custom master page.

In SharePoint 2013 as we know there were two files generated one is .master file and the other one is .html file when we will create a custom SharePoint master page. We should only modify the .html file.

Open the HTML file in SharePoint 2013 designer and see if below tags are presented or not. If it is not presented make sure to add as it is in the .html file.

You can optionally search for “ContentPlaceHolderMain” and insert the snippets nearby to that.

<!–SPM:<SharePoint:AjaxDelta id="DeltaPlaceHolderLeftNavBar" BlockElement="true" runat="server">–>
<!–SPM:<asp:ContentPlaceHolder id="PlaceHolderLeftNavBar" runat="server">–>
<!–SPM:<SharePoint:AjaxDelta id="DeltaPlaceHolderPageTitleInTitleArea" runat="server">–>
<!–SPM:<asp:ContentPlaceHolder id="PlaceHolderPageTitleInTitleArea" runat="server">–>

One thing remember is that, if the tags are presented is should not be Visible=False. It should be Visible=True.

Save and publish the HTML page as major version. Then approve the HTML page if required. Now you should be able to see the list of apps templates.

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This SharePoint tutorial, we learned how to solve add an app page showing loading error in SharePoint 2013/2016 or SharePoint Online.

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Bijay Kumar

I am Bijay from Odisha, India. Currently working in my own venture TSInfo Technologies in Bangalore, India. I am Microsoft Office Servers and Services (SharePoint) MVP (5 times). I works in SharePoint 2016/2013/2010, SharePoint Online Office 365 etc. Check out My MVP Profile.. I also run popular SharePoint web site