Firewall problem

[StacyRose]

The program (Avast Premium Security 20.4.2410 (build 20.4.5312.580)) arbitrarily turns the firewall on and off.
Indicates in the main window that the firewall is turned on, while in the notification window I can see that "You are unprotected", turn on the firewall. But when I click to turn on, nothing happens.
This is a completely unreliable software. 

[Asyn]

Repair Avast:
1. Avast GUI -> Settings -> Troubleshooting
2. Click on 'REPAIR APP'.
3. Follow instructions.
4. Reboot.