It is being caught by the autosandbox.
From the avastUI, Additional Protection, AutoSandbox, Settings, Set it to Ask, that will throw up a screen, suggesting you run sandboxed. Choose Run Normally and check the Remember my answer for this program (or words to that effect).
Or you can go into the same place and add an exclusion for the executable, if you are confident it is clean, and from a legit source, etc.
Personally I would set it to Ask so it doesn't make a decision for you.