HGTV Sweeptstakes fail

When entering the HGTV Smart Home Sweepstakes, it works correctly until you press the Enter button at the end. Nothing happens. When you reload, then it does work, but instead of displaying a thank you it displays javascript. Completely uninstalled then reinstalled, no difference. On Chrome, works properly. Computer Dell 3871, Windows 10 21H1 but had same issue on previous version as well.