I think to get a bug report thing is f11 then it should be the files of the game just copy it and email it to the dev.
Will note tried this before it didn't want to copy everything so I have dive deeper and copy the insides of it
And to sell "milk" press the middle mouse button, which should focus on them, press which cup you want to use (1 or 2) then press and hold the right mouse button then it should pop up the menu to either sell the drink free or have them pay for it you will get hints on what fetish they want by the words they mock you with such as (Bunny, Kelpie, cow, ect) they won't take anything else (in free roam you can immediately tell as they will have the words above their heads)
Hope this helps ya