The Renaissance gave us current Saint Peter's, and many classical literature, nice art, and there exists Christian Humanism too (St. Thomas More, Jacquen Maritain), so I do not agree with the statement these were "14th century errors".
Vatican II is not a scapegoat, but at least sociologically thé core of the Church crisis. Theologically, this has to be evaluated authoritatively later on. It seems it did a lot of wrong there too, but still.
Not all was bad with the Renaissance.
The Renaissance gave us a resurgence of study in Greek and Latin literature and art. It also gave us an increase in the interest and desire to return to pagan Greece and Rome in thought and morals.
Indeed, one sees Christian Humanism and some of this is arguably not contrary to the Faith, but the Renaissance also produced Secular Humanism and forms of Christian Humanism which run contrary to the Faith (one need look only to the variety of bad Popes that dot the horizon of history at this time).
I did not label all forms of humanism as errors. I labeled the general subject as a source of errors. With some exception, Humanism in general was a source for most of the errors which have plagued the Church and Society since the Renaissance.
The beginnings of Absolutism also arise.
One sees the increase in a pursuit of science, but also an increase in its treatment as contrary to the Faith, or at least a wholly secular pursuit which must be free from Church oversight.
Art and Architecture developed quickly, but also did bad and sinful arts also arise. Some of the greatest works in history were produced, but also some of the artists who hated the Church plated their seeds. On the plus side: We have St. Peter's. Sed Contra: We also got Leonardo (da Vinci) -- If you need proof of the problems of his art one need look no further than the androgynous painting "St. John the Baptist" and the earlier sketch of "Angel in the Flesh" where Leonardo has sketched the same character sans animal skin, in a very "excited" state.
Seeds were planted at the Renaissance which when tamed and managed could be handled, but when allowed to grow without restraint gave us Luther, Calvin, Bacon and those men who followed after. The seeds of Modernism also are planted at this time. Had good popes ruled during these days, we might be in a much better place today. Alas, they had the Popes they deserved.
I do not pretend that the Renaissance was wholly bad, but to pretend that it was not the source of many errors which still plague the Church is not giving a full view to History.