As for the Yocan Evolve vape can't work, please check the coil, atomizer or the battery body.
First, check the coil is OK or not?
If you have vaped this coil more than 2 weeks, please consider change another brand new coil.
Then, check the atomizer pater. Most of time, the vape device can't deliver vapor, because of incorrect connection.
You can use a q-tip to clean the contact point, and dry it before you screw it on the battery.
Last but not the least, it's battery problem.
If you have drop this device recently, may resulted with battery problem.
You have to contact the head shop you bought it from, change a new one battery or buy a brand one.