At the end of the movie, when Gus grabs the thing from architect's mouth, he is holding it and looks away and a different shot of him is shown, but he is not holding the thing. In the next shot, he is holding it again.
When Evan is opening the bag from the hole, a shot of his face is seen which doesn't match the one shown before or after.
Lisa's landing from the jump through the window doesn't match the way she jumped.
When Lotte sees the man's face and screams, the scream is heard just before she opens her mouth.
When the knights arrive at the cavern (in the first phase of the movie in the past), you can see a construction barrier between them riding horses.
When Father Gus, as a recreational archer, is using a bow to shoot at a target, he is not wearing a wrist guard. This is a painful mistake even a beginner would only make once.