Locate button in https works well with my map tour:
but if I embed that same map tour in a map series, it does not appears
Due to browser security practices, the Locate button is blocked whenever an app is embedded in another app/page (even over https).
If you need your readers to be able to use the Locate button you'll need to provide a link to your Map Tour in the text of your Map Series so the Tour will open in another browser tab as opposed to embedding it in the Map Series.
Retrieving data ...