I used git push and git clone ... in my terminal. For both I got the error:

fatal: unable to access 'https://github.com/skymassage/cs50sql.git/':
Failed to connect to github.com port 443 after 132367 ms: Connection timed out

I tried the commands git config --global --unset http.proxy and git config --global --unset https.proxy, but it didn’t work. I don’t set up the proxy server manually in my Windows.

And I tried another way. I opened the hosts file in the C:WindowsSystem32driversetchosts and added 140.82.113.4 github.com at the end of the file. It failed again.