No idea what that is.
When you say you reinstalled avast how did you delete the original version or did you just run and overight it.
You may need to run the un installer Avast Removal Tool | Download Avast Clear | Avast as an overight or normal reinstall might not clear out whats causing the problem.
also have a look through this post with my pics on post 22 Transition to Avast Password Manager - #22 by computknit
does it finish the install or do you get that error before the install finishes.
hopefully someone else whos seen that error can advise further.