Defective processing - large slots betrayed the principle

Similar case I have seen in a colleague and was very confident it.
This box I bought as a gift for my daughter to wrap small gifts in. The fun factor is erwarete mutatis mutandis in the secret lock.

Unfortunately, just because the delivered box fails. Namely, the edges of the two corners that have to be pulled out to open, have wide slots, wide by 1 mm. Every attentive observer noted these slots and comes simply by the idea to seek the solution here. The find is unacceptable for such a "treasure box" with secret closure.
Otherwise, the box is processed properly and could serve their purpose.
That's why only 2 points.