Unable to connect to internet while using 3D Warehouse and Extension Warehouse!

I can’t access 3D Warehouse and Extension Warehouse anymore because it always shows a message, that I need to connect the internet, it’s already connected and I checked it many times on several days.
i downloaded 2020 trial, and it worked perfectly, but once i switch to 2018, it stops working.


I also made this longer post, that includes newer tips as well as the basic information about the URL that you are testing against:

Hello, thanks for your reply.
i did it with Google.com, and bing.com as well , and tried with http instead of https , but it didn’t work , please advise

You should use https, and someone in my other topic mentioned that a / was needed at the end for it to work for them. The whole line would then become: