Hi. I'm David, and I'm happy to help you.
See if the website will open in an InPrivate/Incognito window.
To open the InPrivate/Incognito window, open the browser and press "Ctrl + Shift + N". (For Microsoft Edge and Google Chrome)
If the website also fails to open in an InPrivate/Incognito window, does it display any error message/code?
If it just keeps loading, wait to see if an error message/code appears, and let me know what it is.
Please let me know how it goes.
Feel free to ask any questions you may have.