Thanks to @JulianC I also set the emulator. I tried to download it standalone from the official site, but couldn’t. Then switched to Canary Channel. I pressed Tools > SDK Manager, then Updates label and changed channel. Also pressed Check Now button and dismissed a dialog (Remind Me Later).
Then switch to Android SDK and updated needed emulators.
Then reverted back to Stable Channel.
After several days of work I faced some visual bugs in the emulator. Sometimes I have to restart virtual devices from AVD Manager with Cold Boot Now:
Sometimes I recreate virtual devices in AVD Manager.