ConnCraft Hello, While i am unsure of other Avast versions, I have Avast Internet Security
First, i bring up Avast and go to Protection then Ransomware Shield:
Then I Select the Blocked/Allowed apps button:
Lastly, I add the Exe file I want to allow (find the game generally in the "C:\Program Files\Cosmoteer") :
this is what I did that solved my problem. Hopefully, it will help you too! and good luck Cosmoteer.