Can't install Blynk app on phone

I cant install Blynk IoT on myPhone. (myPhone_Power_v1.0.9_09072017, Android 7.0). In the past Blynk app was installed there. Now instalation proces starts but error message appears before the finish.

Are you installing it from the Play Store? Not sure we can somehow help you with Play Store failure to download and install the app, do you have enough free space? What exactly the error messages says?