Had a look around, and it seems like you’re reporting about Survival’s Trials, if I’m not mistaken? Yeah, Survival recently went through a reset, so its Trials will most likely be buggy. I’ve reported it, and hopefully it gets fixed soon!
If you just want to get your Trials fix, Skyblock’s Trials is also open and working, as with Olympus and Asgard Trials (though you need Warrior Rank I think, I might’ve forgotten)