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.
Dear Daniel,
Sorry for my late reply.
To repair Office, you can go to Apps and Features, find the Microsoft 365 product, select Modify to repair. According to your reply, the situation is likely caused by the presentation itself, not the PowerPoint application. I think you don't need to repair Office.
Since the situation is likely caused by the presentation itself, please share it with us. You can remove other slides and private information, then leave slides that reproduce the situation. After that, you can upload it to any online drive and share the file link with us.
We look forward to your response. Thanks for your cooperation.
Sincerely,
George | Microsoft Community Moderator