Internet Goes Down When Firewall Is Activated

For the past few days, I’ve had to turn off Avast Firewall when running my PC as it takes down my internet connection… It took me while to figure out the cause. I’ve kept Avast up to date and the problem still persists I test it every day. Any suggestions on how to resolve this issue would be appreciated.

Perform a clean installation of the latest avast version and see if the problem is solved.