Can't start this add-in | Adobe Stock plug-in for PowerPoint

Launching Adobe Stock Add-in for Powerpoint results in the following error:

 "We can’t start this add-in because it isn’t set up properly". 

To resolve the problem, try the following workarounds in the order they appear below.

Workaround 1: Sign out from PowerPoint and sign in again.

If you still see the error message on launch, try the next workaround.

Workaround 2: Remove Adobe Stock add-in and add it again from the Office Store.