Looking at the debug output, the jobs look fine,...
1. 12_28_54_6810_01_video creates the video file (output: pp2_12_28_54_6810_01.265):
"C:\PROGRA~1\Hybrid\ffmpeg.exe" -y -loglevel fatal -threads 4 -r 25 -analyzeduration 100M -probesize 100M -i "M:\CONVERTING\pp.ts" -map 0:0 -an -sn -vsync 0 -strict -1 -pix_fmt yuv420p10le -f yuv4mpegpipe - | "C:\PROGRA~1\Hybrid\NVEncC.exe" --y4m -i - --fps 25.000 --codec h265 --profile main10 --level 5.0 --sar 1:1 --lookahead 16 --output-depth 10 --cbrhq 16000 --max-bitrate 25000 --gop-len 0 --bframes 0 --ref 6 --mv-precision Q-pel --cu-max 32 --cu-min 8 --output "M:\CONVERTING\temp\pp2_12_28_54_6810_01.265"
2. 12_28_54_6810_02_video patches the video file (output: pp2_12_28_54_6810_12_28_54_6810_02.265)
"C:\PROGRA~1\Hybrid\nvhsp.exe" -full_range tv -colorprim bt2020 -colormatrix bt2020nc -videoformat unspec -transfer smpte-st-2084 -maxcll bt2020nc -maxfall bt2020nc -chromaloc 2 -masterdisplay G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,1) "M:\CONVERTING\temp\pp2_12_28_54_6810_01.265" "M:\CONVERTING\temp\pp2_12_28_54_6810_12_28_54_6810_02.265"
3. 12_28_54_6810_03_cleanUp deletes the old video file (pp2_12_28_54_6810_01.265)
4. 12_28_54_6810_04_create creates the mkvmerge tag file (pp2_12_28_54_6810__04.xml)
5. 12_28_54_6810_05_muxing muxes the new video file into an mkv: (this is where the crash occurs)
"C:\PROGRA~1\Hybrid\mkvmerge.exe" --ui-language en -o "M:\CONVERTING\pp2.mkv" --global-tags "M:\CONVERTING\temp\pp2_12_28_54_6810__04.xml" -d 0 --default-track 0:yes --default-duration 0:25fps --aspect-ratio-factor 0:1/1 --no-chapters --compression -1:none --forced-track 0:yes --no-audio --no-subtitles "M:\CONVERTING\temp\pp2_12_28_54_6810_12_28_54_6810_02.265"
5. 12_28_54_6810_06_cleanUp deletes the tag file (pp2_12_28_54_6810__04.xml)
12_28_54_6810_07_cleanUp deletes the video file (pp2_12_28_54_6810_12_28_54_6810_02.265)
My guess is that there is some problem with the patching.
One bug (missing feature) I see is that Hybrid doesn't check atm. whether nvhsp actually creates the output as it should. (fixed that here

So my guess atm. is that nvhsp doesn't create the output file and Hybrid only notices it once it tries to use the output for muxing.
Since I can't reproduce this here since I don't own a graphic card which can encode 10bit H.265 I need more help to track this down.
-> enable "Config->Output->Container Settings->General Settings->Keep intermediate files", recreate the job, enable debug output level 9 and run the job again.
Assuming still crashes, post the debug output and I can tell you the nvhsp-call Hybrid uses. You then would need to call that call in a Windows Command Prompt and tell me the output.
Cu Selur