When Tariq is uploading the hack to the bank's system, the IP address is shown as 1.72.14.218.191 which is an invalid address format.
Sarah Caulfield is supposed to be an American from Boston, but uses British English speech patterns, most obviously the singular/plural verb 'to have'. She says, for example, "Nightingale have" (British) instead of "Nightingale has" (American). In addition, her accent and pronunciation change, often revealing she's not an American. This breaks immersion.
When Ros Myers actually pulls Perrot off his feet in the hanging scene, the safety harness tightening can be seen through his shirt.