Around 5 minutes, 40 seconds (5:40), Joshua and Diaz ate playing Texas Hold'em, a popular type of poker game. Diaz says, "Raise" and puts some chips in the pot. He makes 2 errors by doing this. Anyone familiar with any variety of poker games knows someone has to make a bet first before some can "raise it". Diaz simply said "Raise" before any bet. Also, you always state the amount you are betting; however, Diaz didn't do this either. Both of these are obvious mistakes.
Both times Joshua is playing poker in the casino, he has the same 2 "bodyguards" plus the female NSA agent with him. It is pretty obvious that Diaz (the Finance Minister) would surely be suspicious of them being present each time he is playing against Joshua. This is a glaring hole in the plot.