You have no chlorine in your pool. I suggest you add one small jug of Clorox immediately. (If you add it in the day, it will disappear in a few hours)

CYA is stabilizer. Your test indicates you have virtually no stabilizer as well. 1.5 lbs should bring you to 40ppm and will help you hold chlorine during the day. It will take a few days for the stabilizer to be effective in your pool.

Meanwhile, after the initial dose of 1 gallon, try to keep your Cl in a 3-6ppm range and your pool will stay nice and clear.