Avast Online Security(AOS) Not install with 11.2.2259

Consumer Products Public Beta Avast Antivirus Beta
1

Why AOS add-on not installed with a clean installation of Avast! beta? in Google Chrome Version 49.0.2623.110 m
Tested with restart of the pc-Failed.
Tested with Close the chrome and re-opened it.-Failed
Is it a bug or what?