When I want to add apps using my custom master page only the Noteworthy ones are visible (Document Library,Custom List,Task). If I switch, to another not custom master page (ex. seattle) all is fine. Is there maybe a snippet I ought to add to show all apps? Or maybe, is there another issue?



You have to add the following in your custom Master Page:

<!--SPM:<SharePoint:AjaxDelta id="DeltaPlaceHolderPageTitleInTitleArea" runat="server">-->
   <!--SPM:<asp:ContentPlaceHolder id="PlaceHolderPageTitleInTitleArea" runat="server">-->



This issue might occur because of

  • You may have used a system custom master page that some placeholders were deleted or its visibility set to false like "DeltaPlaceHolderPageTitleInTitleArea"
  • The app installation service timer job is disabled.

To check the missing placeholders you should check this link that helped me


Hope it helps you !

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