"Deploy as instant app" checkbox is disabled

I've set the <dist:module dist:instant="true" /> in the manifest and now I'd like to build an instant app directly to the emulator, but it seems the checkbox is disabled. Any ideas to why?

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Which permission are available to an instant app?

Instant-enabled app bundles can only use permissions from the following list: ACCESS_COARSE_LOCATION. ACCESS_FINE_LOCATION. ACCESS_NETWORK_STATE.

How do I add instant app?

Where to find instant apps. To access an instant app, Android users must first opt into Instant apps by selecting 'Settings' -> 'Google' -> 'On' under the Instant app feature.

What devices are supported for Google Play Instant?

Google Play Instant enables native apps and games to launch on devices running Android 5.0 (API level 21) or higher without being installed. You can build these types of experiences, called instant apps and instant games, using Android Studio.

Download the latest version of this SDK from the SDK Tools tab within the Android SDK Manager. And after do File/Invalidate Caches and Restart. That helped me.