Premiere Pro 2021 shuts down computer

I have Adobe Premiere Pro 2021 installed on my Imac. I have been editing some small pieces. After a few minutes, suddenly the computer shuts down. It won't restart, I have to turn it back on and then restart the application. I have found that this usually happens when I am inserting or adjusting effects (scale or position transformation, or video transitions, or rendering).
I have this crashing problem only with Adobe Premiere Pro 2021, all other applications work correctly on the Imac.
I'm going to install Adobe Premiere 2020 and 2019, see if those run fine and don't shut down the computer. Visibly there is some incompatibility with 2021.
My Imac : Retina 5K, 27 inch, 2017 - Intel Core i7 4-core 4.2 GHz processor - 64 GB 2667 MHz DDR4 memory - Mac OS Monterey 12.6

Thanks for any tip.