A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Of you are using Office on a Windows device, because that error appears in more than one Office app the best option is to perform a full repair of your Office installation.
Open the Settings App (gear icon on your Start Menu)
Go to Apps, then scroll down to find Microsoft Office
Select that and choose Modify - Online Repair.
That should fix any issues with your Office Installation.