Huh, that's no good but let's see what else can be done to help you out. First off, have you every been able to open a PowerPoint on this device before? Is there anyway you can send the presentation to another device to make sure it's not the file that's going a little wonky?
Just checking to see if you still need some help. Please let us know so we can assist. Thanks!
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Let’s first restart the device and check if it resolve the issue. If the issue still persist you may clear the App Data Cache for the Office apps and check if it helps. You may refer to this 'PowerPoint recovery' page or below steps to clear the App Data Cache.
1. Go to Settings, select on App.
2. Go to the particular Office application, right click on it a select Clear Cache.
3. Repeat the same with the Other Office applications, such as Excel, Word
4. Re launch the app and check if the issue persist.
Hope it helps.