Avast Secure Browser is blocking URL

ASB is blocking the URL: www.autosattlerei-jschmid.ch and show the message:

“You don’t have permission to access this resource.” and “Apache Server at www.autosattlerei-jschmid.ch Port 443”
In Chrome, FF and Edge this URL get loaded without any problem or blocking.
So I would like to know:

  1. Why this URL get in ASC blocked, is it a setting in ASB?
  2. How this problem can get fixed?