Can anyone help me as to why my customise forms page opens but wont load?

Thanks for letting us know about this, sam84.

Issues with page not loading can be fix by performing some browser troubleshooting. Let's begin by using a private window to see if you'll get the same result. Below are the keyboard shortcuts that you can refer:

• Google Chrome: press CTRL  + Shift + N
• Mozilla Firefox: press CTRL  + Shift + P
• Safari: press Command + Shift + N

If it works, go back to your original browser and clear the cache to make sure your browser functions more efficiently. Otherwise, you can try other supported browser to help narrow down the cause of this behavior.

It's my goal to make sure this gets resolved. If you need more help with this or have additional questions, just let me know. I'm always happy to assist. Keep safe and have a good one.