The final bus station Jack runs to does not exist. The establishing shot before depicting a Montreal landmark facing the bus stop would place it in the middle of a popular tourist area opened only to pedestrians and cyclists in the old port of Montreal.
When Nick uses water from the fire sprinkler system to fill the safe, that should have triggered a water flow alarm. There is a detection switch that sounds an alarm if water begins flowing through the system (as this is typically caused by a sprinkler head discharging water to put out a fire), which would summon the Fire Department. In addition the water flowing out of the pipe should have been a dark brown color, not crystal clear as shown in the movie. The stagnant water in fire sprinkler systems always contains high amounts of rust, pipe oil, pipe sealant, and other sediment.
Nick uses a PVS-14 night vision monocular to see the IR beams while he is in the basement about to go into the cage containing the safe. However IR beams do not show up red, they show up white when using night vision devices.
The method used to blow the door off the safe by filling it
with water and then igniting a charge would have completely crushed the scepter and the metal box it was in. Besides, safes aren't watertight.
When Steven explains to Nick Wells how he hacked in to Ironclads secure server, he states that he got in at a "root COBOL level". COBOL is an obsolete mainframe programming language and has absolutely nothing to do with breaking into computer systems, and even less can you be at any form of "COBOL level" when visiting a remote computer.
At the end of the movie, when Nick tells Jack that now every police in the city is looking for him, in that moment he has no way of knowing about Danny the manager discovering Jack in the server room. But he does know that Jack (Bryan) didn't finish his shift, which Nick told Jack earlier would blow Jack's cover.
When Max writes the location for Nick to exchange the scepter for the money, he doesn't give it to Nick. As Nick leaves, his hands are empty and we didn't see him put it in his pocket. A long shot of Max shows that the paper is no where in sight.
When Jack and Burt are in the car on their way to pick up Nick from his underground reconnoiter, there is a lamp inside the car that is shining on Jack's face, and is turned off as the car approaches the camera.
The goof item below may give away important plot points.
In the shots where Jack is typing at the laptops wired in the control room, none of the computer behavior on the screen correspond to his actions. This is especially visible just after his faked delay, immediately following Nick's call to abort, in which a standard UNIX Bash shell prompt is shown, repeatedly running commands such as "telnet" and "ls": normal everyday computer commands which have absolutely nothing to do with camera operation.