Blynk.notify not working

Uninstall this and install version 0.6.1
Re-compile your code and re-test.

Edited to add…

If you are using Blynk IoT then you should be using the very latest Blynk library and you will need to replace Blynk.notify() and with Blynk.logEvent and create a corresponding event in the web dashboard, then configure the notification settings for that event.
Please read this post for more information…

You should only be running version 0.6.1 of the Blynk C++ library if you are running a Blynk Legacy server on your local network.