Why was john wycliffe not popular with the leaders of the roman catholic church?

John Wycliffe left quite an impression on the church: 43 years after his death, officials dug up his body, burned his remains, and threw the ashes into the river Swift. Still, they couldn't get rid of him. Wycliffe's teachings, though suppressed, continued to spread. As a later chronicler observed, "Thus the brook hath conveyed his ashes into Avon; Avon into Severn; Severn into the narrow seas; and they into the main ocean. And thus the ashes of Wycliffe are the emblem of his doctrine which now is dispersed the world over."