my powerpoint presentation disappeared

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1. This keeps appearing in my presentation. It says "PowerPoint found a problem in ((the project

   

2. FIX: When a PowerPoint Slide Goes Blank (Troubleshooting Steps)

   

3. Appearing & disappearing of slides in powerpoint

   

4. How to solve PowerPoint Not Working in Windows

   

5. Pc Fix Microsoft PowerPoint Found a problem with content in can attempt to repair the presentation

   

6. PowerPoint add-in disappeared