When I try to go to the basement in the witch academy on the apprentice side, I get this error and it doesn't let me do anything after that until I close the game.
as other comments had pointed out its actually a relatively easy fix, you just need to
1) go to the data file of the game(the one named www)
2) go find Map364 in data
3) open the file with an app like notepad,
4) use ctrl+F to find the sentence "you helped out"
5) the entire sentence/code should be "parameters":["you helped out it' s only fair you get to"]},
6) Delete the space between it and 's , or basically just retype that word if you want to be safe
7) save the change
8) Finish, open game to see result