Unable to open App Store on my MacBook Air

Re: MacBook Air 13″, macOS 15.4 " I try to open App Store but its not loading"

✽ If you haven't already : You can check you are signed in (to your Mac) with your correct Apple Account details

See: Sign in to your Apple Account on the web or in your device settings - Apple Support

✽ See what to do: If you can't connect to the App Store, iTunes Store, or other Apple services - Apple Support

✽ More info. if needed: If you can't download or update apps on your Mac - Apple Support