Unable to burn Blu-ray

Finally, some good news! A couple of days ago, an Apple tech support person told me that,
while Apple does not “support” partitioning the main hard drive in order to set up a separate OS, in this case, since we were trying to get Compressor to function properly, it was OK to do. After partitioning, he explained that to download and install an earlier OS, I would have to boot up from “internet recovery” (Shift-Option-Command-R). After downloading and installing Catalina, I upgraded to Big Sur. Then, I attempted to make a Blu-ray. No luck. Same problem. The material was on the BR but did not read on my BR player. So I re-installed Catalina and Compressor 4.5. which was one stage earlier than 4.6 which I have on my Monterey OS. Bingo! It worked! I was successfully able to burn a BR. So if I want to make a BR, I have to open my Catalina partition and work from there. I shouldn’t have to do this but, as for now, that’s the way it is.

BTW, I had the same crash during the "Create Disc" phase. However, when I removed the background pic from the menu, I was able to burn a BR. It seems that between Monterey and Compressor, there is bug.

That's exactly what I did.