That would be the first choice to do since they are the owner of the site. There might be a reason why they prohibited people from getting the API key for those who use bots. I always ask the owner if the problem is on their side since there is nothing you can do except the ability to gamble.
It might just be they overlooked a change they made because this happens a lot of with the API's I have used in the past where when they make a change they release new keys and your older ones are not valid anymore. It would be a simple fix where they give you new keys to access the site.