PiCrawler wont turn on

I just got my piCrawler and i assembled thr main body but i am unable to turn it on. I tried to plus the raspberry pi in with a usb c cable wich worked but wverything is wired correctly and it will not start without the usb c. What could be causing this?

Are you connected to a battery pack, and is the battery sufficiently charged, please check to make sure.
Because robot hat needs battery power, and then the battery sends power to Raspberry Pi through robot hat.
You can also provide us the problem video, so that we can analyze and solve the problem.