There are several possible reasons that you might be unable to access a website even though it is not down for others:

1. Check your internet connection. Make sure that you have a reliable connection. Consider restarting your router and/or modem.
2. Check for any software blocks from your anti-virus or firewall. Temporary disable any blocking programs and see if that helps.
3. Clear the caches on your device. Each device handles this differently, so research the specific instructions.
4. Double-check the URL address. It is possible that the address was typed incorrectly, or that the domain name was mistyped.
5. If using a VPN, try to disconnect and access the website without it. Some websites are blocked by certain VPN services.
6. Confirm that the website is not blocked in your specific location or country.