I want to tell you something important..
If you have Meizu M5 device DO NOT UPDATE THE FIRMWARE just stick with the stock firmware that comes with the phone
there is no need to update the firmware it'll cause bugs , lags & errors !
The stock firmware is "Flyme 126.96.36.199G" this is the best firmware for your device
you can turn off automatic update option in the update tool
you can download the stock firmware from this forum and flash it using recovery mode "hold power button + volume up until meizu logo appear then release the power button" then connect the phone to pc with usb cable , copy the firmware to "recover" drive then press "start" on phone screen & wait untill the process is finished..
note : the flash tool didn't work for me