May know what type of vape cartridge have you installed?
If not the replacement vape cartridge for Yocan Stix, please install a original one to have a try.
The Yocan Stix flashing 3 times means the battery wont detect the vape cartridge.
By the way, the Yocan Stix is designed for 510 thread oil vape cartridges, and it's not compatible with all vape cartridges.
If your device still can't work, please contact our after-sale team at email@example.com
Have a nice day.