Came across another issue today!
(Still running 2.9.2, Windows 10, I'm rocking Powerpoint 2007)
Tried to run a fairly standard PPT presentation (no transitions, just images or words per slide). When it loads, I get an error that says:
"An error occurred in the PowerPoint integration and the presentation will be stopped. Restart the presentation if you wish to present it."
The strange thing is that as you can see in the screen shot, it seems to load the presentation, but the live screen just shows the desktop!
Edit: same issue with a brand new presentation with nothing but two slides with text on them.
Edit2: Here's the log - https://pastebin.com/zyvTeyjR There are a bunch of exception's and errors related to the ppt stuff!
Edit 3: I upgraded to Office 2019, and it now works. There may need to be something that checks for what version of PPT is running!