same same problem
Quite infuriating. 5 minutes of GoPro holiday footage that I finished the colour grade on and now getting these render failures.
From my tests, it looks like the noise Reduction and the Dehaze OFX are the issues. Disabling both of these allows the render to progress until it comes to another random clip with the same NR/Dehaze nodes.
Incidentally, all the clips have NR and most have Dehaze.
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OK, at least I eventually got it fixed - the copy/paste to new project was a failure for me.
What I ended up doing was to move the offending clip out of the timeline and then located it in the media pool. I drag the in/out points from the media pool and into the timeline - essentially the same snippet from the media. I copied the offending clip and pasted all attribures to the newly dragged one. I did the same by also applying the grade from the offfending clip to the new one.
So basically I've recreated the problematic clip with a fresh copy. I needed to do that to another 2 clips.
The full render completed without any problem. Maybe those clips in the timeline had been corrupted or something. No idea.
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Looks like a bug so hopefully, something gets done about. I'm glad my livelihood doesn't depend on my holiday vids
macOS 12.2.1, 3.7GHz Intel Core i7, 64G DDR4 Ram, Radeon 8G RX580 GPU, 250/500Gb SSD storage, Synology 920+ 8T NAS