Website Blocked

A website that I have accessed daily for the past 4 years is now being blocked as of 2:30pm yesterday.  I had 4 chat sessions online and numerous calls today.  I am beyond frustrated.  The only solution I was given is to disable the Advanced Secuirty which I am not comfortable with doing.  Is there any way to make this website that I use a "safe" or "allowed" website while keeping the Advanced Security enabled?  The website is: https://bowtie.mailbutler.io/user/login.  

Thank you!