Most competitions on Facebook need to be loaded on a computer, not a mobile device, in order to work.
If you’re having issues, consider using a different browser and letting the page fully load.
If you’re still having issues, please submit a ticket on our help desk page: https://helpdesk.tenplay.com.au/support/home.
In the description please outline what competition you’re trying to enter, what page it is on and what browser you are using and we can look into the issue for you.