As we know, the bottom of the cartridge is the contact points. And most of cartridges, the contact point can pull out.
So, if your device flashing light in multiple times, please try to pull the contact point a little.
Like this thread discuss: How to fix the flashing blink of Yocan Evolve Plus?

If you pull out this pin by accident, just need to push it back to the cartridge.

Any further question, please comment below.