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The owner’s manual has a troubleshooting guide. Go through that step by step.
May be some loose connection. Maybe one the of ecu connectors?...
*IF* not in neutral, it won't start w/ the bike in gear.
Also, if the bike is in gear, the clutch must be pulled in for it to start.
It's going to be something simple. Take a deep breath.
I concur that this sounds like a safety interlock. From your video, battery power looks...