Gapps has stopped. How to fix?

Good Morning. Yesterday I was excited to flash CyanogenMod 12.1 in my other Android device. The process was the same and I did everything correctly. Unfortunately, after flashing Google Apps, the system wouldn't stop showing pop-ups like "google app has stopped", "google services has stopped". Nothing about Gapps works, even the keyboard. I have tried to wipe data/factory reset, using CWM and reflashing CM12.1 ONLY, but it didn't work. The pop-ups are still there. Maybe there's some Gapps fragments in the system... Please, I would appreciate any possible help. Thanks