Sadly, the debug output does not contain an error message.
If you open the Preview:
Does it show an error?
Does it show an empty Window? (if it does, keep it open, start another window through Tools->vsViewer and press F5 in that window. Do you see an error now?)
Cu Selur
Preview begins to open, but then closes quickly before any video is displayed.
If I try to start the job, it crashes with Exit Status 0.
If the preview does not work, neither will the encoding.
As soon as you do not use YAHR, does the preview work?
Any difference if you don't use 'Compare View' ?
Is there a difference if you disable "Filtering->Vapoursynth->Misc->Source->Prefer LSMASHSource over LWLibAVSource for mp4/mov" ?
Does this only happen with your current source or other sources - with different characteristics - too?
YAHR off - preview works
Compare view off - no preview
Prefer LSMASHSource over LWLibAVSource - no preview
Try whether uninstalling Hybrid and installing the latest dev I uploaded 2 hours ago changes anything.
Cu Selur
If you look at the Vapoursynth Script View, copy the script, then open Tools->vsViewer, paste the script and press F5, does it show an error or does vsViewer simply close?
What CPU are you using? (I changed a lot of scripts to make more use of akarin and zsmooth and both require AVX2 capable cpus.)