I too wouldn’t disable the network shield just to view a site that was blocked by the network shield.
Many sites are hacked to point to malicious sites or have had so many detections of malicious content that their domain gets added to the malicious sites list in avast.
What is the domain name ?
When posting it, change the URL from http to hXXp or www to wXw, to break the link and avoid accidental exposure to suspect sites, thanks.