What were two reasons that the power of the roman catholic church began to weaken around the 1400s?

Around 1400s, the power of the Roman Catholic Church began to weaken because first, the people who opposed it took powerful positions in the society. Second, the two popes also were elected which resulted in a split of the church. The Catholic Church separation lasted from 1378 to 1417 and this was known as the Schism. Pope Clement V. wanted to move the Catholic government to Rome, Italy, Avignon and then to France. There was a conference held by the Emperor from 1414 to 1418 and they were discussing about ending the Schism. Most people also wanted a new Pope and later on they picked a new Pope, it is Martin V who started to unify the Catholic Church.