You have posted in the General section, so we do not know which Avast product you are having a problem with.
If it is Avast Antivirus or Avast One and you are having web browsing login issues using standard browsers e.g. Chrome, Edge, Firefox etc, please describe.
If it is Avast Secure Browser that is the issue then maybe best to post in the ASB section of the forum here:
Note, I am not an Avast Team member, just another user.