Hi. I downloaded the new version, which is 501, and started going through it. Apparently, I did everything too quickly in my experience. I went through the plot of the Royal City and tried to go to the Dairy Farm, but it was closed by a cow. I'm reading guides - it should be open. What quest or trigger should I complete to get there?

I believe that unlocking the dairy farm is later in the game now than it used to be. I was worried at first too but it opens up after a different story beat now. If you keep playing along with the story it will open up.

It is now just before the witch academy