(This one is difficult to see - the error is in the left image.) Read from right to left and carefully look at the 1st letter in the 1st word - next look at the 1st letter in the 2nd word - note that they are different. They are the similar in the image on the right

On the error note the first two letters of the second word from the right side are the same (double Hebrew R) and you get the meaningless word RA RAV – Ra Rabbi, while on the correct note the first letter of  the mentioned word is the Hebrew fifth letter (as H) and then you get HA RAV (The Rabbi). The letter is similar to the second letter in the world (the Hebrew R) but has an additional “leg”.