while adding web part zone using SP Designer nothing has been added to page layout

Question

I am trying to add web part zone to new page layout template using SP Designer but after clicking on button "Web Part Zone" nothing is happening.

fyi I have migrated site from SP 2010 to SP Online.

Answer 1

Can you add web part zone in other site which is not migrated from SharePoint 2010?

Try to add the following snippet:

<WebPartPages:WebPartZone runat="server" Title="TestZone1" ID="TestZone1">
<ZoneTemplate></ZoneTemplate>
</WebPartPages:WebPartZone>

Similar issue post for your reference:

Add web part zone in custom page layout