Yes, and the primary reason is because Ellen's testimonies (her alleged inspired words) are against the Trinity.
“We invite all to compare the testimonies of the Holy Spirit through Mrs. W., with the word of God. And in this we do not invite you to compare them with your creed. That is quite another thing. The trinitarian may compare them with his creed, and because they do not agree with it, condemn them. The observer of Sunday, or the man who holds eternal torment an important truth, and the minister that sprinkles infants, may each condemn the testimonies’ of Mrs. W. because they do not agree with their peculiar views. And a hundred more, each holding different views, may come to the same conclusion. But their genuineness can never be tested in this way.” - Review & Herald, June 13, 1871
They = the TESTIMONIES not of Ellen White BUT THE HOLY SPIRIT. What they are saying is that Ellen's part of this [anti-Trinitarian] rhetoric was only the meat suit.
The Doctrine of the the Peccability of Christ and the Personality of God are two Doctrines that are incompatible with the Doctrine of the Trinity - you simply CAN'T believe in the Trinity while affirming Ellen White was in any way a prophet other than false.