Check your internet connection and ensure it is stable with adequate download speeds (use speedtest app by Ookla on Play Store to help with this). Also, try restarting your phone; are you still experiencing this problem? If so, try different browsers such as Brave or Chrome and go to the same website; does it load successfully on either browser?
If all else fails, try wiping the cache partition on the phone and that should resolve the issue. To do this, just search 'how to wipe cache partition (phone name)' and you should find what you are looking for 🙂. Hope this helps! 😎