Remove the all traces of the app from your computer.
Re-download the app again from our website
Pause the antivirus software (recommended for 1 hour or until reboot)
Install the app
Create an exception for the app in your anti-virus software
This is because you downloaded the app directly from our website instead of using the Google Play store. Do the following to eliminate this error:
Navigate to Setting > Security.
Check the option "Unknown sources".
Tap OK on the prompt message.
That’s all, now you can install the app.
Hold down the Control key on your keyboard while you click the application icon and then choose Open while still holding down the Control key.