Emulator won't start after installing Firebase?

Question

Emulators

Worn out. Help me to understand.
After installing Firebase, the emulator does not start.
The terminal does not display any errors. Writes:

In general, I started the installation according to the instructions from here:
https://firebase.google.com/docs/android/setup
At the last stage, I encountered (as it turned out) a common problem - Firebase conflicted
with my package

implementation 'com.android.support:appcompat-v7:28.0.0'

I spied on the stack.
Added:

implementation 'com.android.support:support-media-compat:28.0.0-rc01'
implementation 'com.android.support:support-v4:28.0.0-rc01'

And there don't seem to be any errors.
But the emulator won't start.
Firebase is not installed. For 15 minutes already, he has been checking

options on the Krch website, offer. We'll check everything