In question 3 Akari, a light is missing at R7C9.
In question 11 Ayeheya, a black grid is missing at R12C4.
In question 19 Nagenawa, a square is mistakenly drawn, which is actually the border of the grid.
Part of the answer of question 29 Compass is missing.
Another error
Also, for puzzle 14, in the first row, the line from 1 to 3 is missing.