I'm assuming this server is down? Downloaded and installed but it's just sitting at main screen with no options to do anything. Also the website link in the post is dead
After doing the patch go to the timeless guy (the polar beat) click the ad option for essence and it should fix that. I was having the same issue until I did the patch. Each time you buy the option the rewards will increase
Lucky Patcher can be applied to this mod for in game purchases. It will allow you to get 23 essences per ad watched. Buy the recipe for essence potion and empty vials and craft your own.