When you are working with the PowerPoint plugin and you get this notification:
You will need to allow VBA in your PowerPoint first, to be able to use all the functionalities of the plugin.
You can activate this setting under "File" > "Options" > "Trust Center" > "Trust Center Settings".
When clicking on "Trust Center Settings" the following pop-up will open:
Where you can activate "Trust access to the VBA project object model" and click "OK".
In case macros cannot be enabled due to your enterprise security configuration, please check out this article for an alternative solution.