Export not working on PPro 2023

Haven’t used PPro for a couple of weeks. Went back into a project to re-export something, and the export function had stopped working: Ctrl+M, File > Export > Media or going to the Export tab all just gave a grey screen with the spinner which sat there doing nothing.

I tried opening up a couple of other projects which were working fine, and exporting didn’t work with those either. (It had finished creating all peak files etc.) I could *play back* the timeline with no problems or glitching, which is weird; mostly, issues like this also affect playback in my experience.

Uninstalled PPro with CCCleaner & reinstalled. Restarted the machine. No dice.

Then I updated my gpu drivers. Suddenly, the export function worked. Great! I exported that timeline (1 of 2 I needed to export), but… when I went into the second timeline, and tried to export that, I’m back to export not working. Spinner. Nothing.

I’ve deleted cache, prefs, etc with Alt+Shift+startup. What’s going on? Is there anything else I can do to make sure this doesn’t happen again?

System: Threadripper 3960X, 128GB RAM, RTX 4090 24GB, Windows 11 Pro. Have updated everything I can think of.