Can't login to supplier's Forum when using Avast Secure Browser

I can’t login to the Microchip forums when using “Avast Secure Browser” Version 58.0.171.84.
I have never had any trouble logging into this when using Google Chrome (now Version 66.0.3359.139)

Forum: https://www.microchip.com/forums/f291.aspx

Login asks for username/password/Verification, but nothing happens when click “Login”.
Same Login screen works fine on Google Chrome.

Help
Paul

Update to the latest version of ASB (V65.1).