Hi all! I was wondering if anyone had a problem adding comments to the powerpoint slides. I want to comment on other people's slides and track changes, but every time I try to, it gives me this error message:

"We're sorry, something went wrong that might make PowerPoint unstable. Please save your presentations and restart PowerPoint."

I'm using Office 2013 and it only has 20 slides on there. I've restarted and tried, but still won't let me. I don't have any other windows running except PPT.

Thanks for reading