Would be great if those with the AppSupport not starting issue could send us some logs.
You can use this gather_logs.sh script.
Download the script on the device and run it like
sh gather_logs.sh
On first run it will prepare the logging. After that reboot the device, try to start AppSupport, and after some time run the script again. It will pack the logs and reset logging configurations back to normal.
And you can send the log package to me as a DM here. The logs may contain personal information, so don’t share them publicly.