smartEditPerspectiveToolbar div is empty when a user goes on any page . Ideally modes (preview, basic, advanced) should be there so that user can edit the page accordingly.
The missing of perspective toolbar in SmartEdit is usually related to the webApplicationInjector.js not being correctly configured or missing parameters. With that in mind, I recommend you checking below Knowledge Article where we explain the best practices and how to troubleshoot webApplicationInjector related errors:
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