Why the wrongness of "Our Father" translation wasn't spotted earlier? Pope Francis thinks the church should tweak the translation of the “Our Father” to clear up the confusion around the phrase “lead us not into temptation.”

We all know God doesn't lead us into temptation. James 1:13


  When tempted, no one should say, "God is tempting me." For God cannot
  be tempted by evil, nor does he tempt anyone;


My question is why the Catholic Church didn't notice this error much earlier and kept encouraging wrong translation which resulted in a wrong request to God for 2000 years. Did any of the saints ever notice this error? Many were mystics and never sensed that it is a wrong translation? 

How is the Holy Spirit's influence embedded in Church's infallibility if such an obvious error was missed? Is this a matter of faith? To believe wrongly that God lead us into temptation? I understand that today's pope noticed but why is it so late if the church should be our protector in what we believe?
The Our Father has not been wrongly translated.

It is Catholic dogma of the highest degree (de fide) that there are no errors in Holy Scripture, and the 4th Session of the Council of Trent defined the dogma that St. Jerome's Vulgate translation—which says in both Mt. 6:13 and Lk. 11:4: "et ne nos inducas in tentationem" ("lead us not into temptation")—is "free from any error whatsoever in matters of faith and morals," as Pope Pius XII later summarized Trent's dogma.

Read St. Thomas Aquinas's Expositio in orationem dominicam a. 6 for an explanation of "and lead us not into temptation," specifically:


  But does God lead one to evil, that he should pray: "Lead us not into temptation"? I reply that God is said to lead a person into evil by permitting him to the extent that, because of his many sins, He withdraws His grace from man, and as a result of this withdrawal man does fall into sin.