Why can't log in to apple store?

'If you can't connect or sign in to iCloud', click here --> https://support.apple.com/HT203512

VPN prevented sign-in --> https://discussions.apple.com/thread/253164691

"If you can't connect to the App Store, iTunes Store, or other Apple services" click here --> https://support.apple.com/HT201400

- If none of the suggestions work, try the last one: "If you’ve tried all of the above steps and you still can’t connect, contact Apple Support."

For support, click here --> https://support.apple.com/choose-country-region Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

Contact Apple for support and service --> "See a list of Apple phone numbers around the world."

Click here --> https://support.apple.com/HT201232

Try to download any app and when asking to log in then type in your Apple ID and your password, make sure that all id passwords starts with capital letters in the first Letter