The Yocan UNI Blinking 5 Times means your device can't detect the cartridge.
As for your UNI blinks 3 times, please check the cartridge connection with the battery, to make sure it is connected correctly. Three lights flash 3 times means short-circuit protection.
Please try to use a q-tip with isopropyl alcohol to clean the contact points.
Or install a brand new vape cartridge have a try.