There is a problem with not being able to log in to the Steam site

Information
windows 10 21h2 (updated)
windows defender, firewall - off
vaccine - off
adguard - off
Unicorn Https - off
Line company: SKB (Korea)

When I try to access Steam, it says my account is invalid.
I changed my password and tried to log in again, but it says wrong.
I reinstalled thinking there might be an unknown OS conflict.
I set up port forwarding in my router settings according to the steam guide. See capture.
I followed the guide to setup proxy settings in Windows 10.
Still I can’t log in.

When I try to contact the Steam manager, the menu does not appear.
Please tell me how to solve it.
Or, tell us the steam manager’s direct mail.

Thanks you.

Port forwarding
2
external port / internal port