I'm using a MacBook Pro 2020 13" M1 with newest MacOS Monterey 12.1.
When I did the Auto-Transmission after editing the RAW's in LR, LRTimelapse crashed without an error, only opening a lot of Adobe DNG's in taskbar (screenshot). Then my MacBook freezes and restarted.... :-(
Now I can't start LRTimelapse, nothing happens!!

Normally after one or two minutes you should be able to launch LRTimelapse again (it will then automatically remove it's lock file).
It might be a good idea to restart the computer also.

If you keep getting such problems, please reduce the number of parallel threads for video rendering under settings/expert settings.

I restarted my MacBook, now everything works great and fast on M1!
Ein Boot tut gut ;-)