contest problems not shown

I registered for the contest that is running right now but cannot access the problems

Can you post a screenshot of the error you are getting?

I cleared the cache, then it worked thank you. But I have another problem now: I just got CodeChef Pro, partly to see video solutions but they all the videos appear as black screens without any content. Do solution videos just not exist for many problems or is that some technical issue?

No, if you can see the video thumbnail then video solution is present. Can you tell which browser and OS version you are using?

Safari and Ventura 13.2.1 (22D68)