Here is a troubleshooting and FAQ page for Snapdragon Flight: https://github.com/ATLFlight/ATLFlightDocs/blob/master/TroubleshootFAQ.md
Here is the Snapdragon Flight landing page with links to useful information: https://github.com/ATLFlight/ATLFlightDocs
And you may search the forum archives to check if your question was already answered.
- Ensure that you've installed the latest version of the platform BSP and flight controller addon using the procedure here.
- Please provide the following information if appropriate: Brief description of your hardware setup (whether you're using the Snapdragon Flight developer edition, how are you powering the board, is the ESC board connected, etc).