Open IIS Website using Public IP - Port Forwarding

[wireless]

Please help. The IIS Website works when I open using local IP and names:
http://192.168.1.64:80
http://127.0.0.1:80
http://localhost:80
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The Telus Router Model is "TELUS Wi-Fi Hub".
Internet Plan is TELUS Gigabit Internet (Residential)
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I added Port forwarding in the Router
Public Port 80 to Private Port 80 in local IP 192.168.1.64
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The following website shows port 80 is accessible from outside IP
https://canyouseeme.org/
Success: I can see your service on 108.180.xxx.xxxon port (80)
Your ISP is not blocking port 80
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For testing purpose, I temporarily turned off Firewall in the Router and also in the Windows.
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When I open the website using public IP http://108.180.xxx.xxx:80
I get following error:
This site can’t be reached108.180.xxx.xxxx took too long to respond.
Try:
Checking the connection
Checking the proxy and the firewall
Running Windows Network Diagnostics
ERR_CONNECTION_TIMED_OUT


More... (https://forum.telus.com/t5/Internet-Home-Phone/Open-IIS-Website-using-Public-IP-Port-Forwarding/m-p/130111#M32299)