moonfruit should be one word. Assuming you are typing in moonfruit.com it may be an Optus DNS issue.
Try changing your primary dns server on your device to 188.8.131.52 or 184.108.40.206.
Some Optus supplied modems/ routers don't allow you to do this so you may have to change do this change on the computer, laptop, phone or tablet.
You may need to contact Optus technical support for this one.