Tell us then.....
What in the article is incorrect?
Sure, since you asked. The article conflates the condemnation of de transitu with condemnation of the doctrine of the Assumption. That's not the same thing; a book can contain some truth and still contain a great deal of error and be worthy of condemnation.
It's really a pretty straightforward error of fallacy of composition.
Besides, do you really think -- honestly, now -- that Catholics are so ignorant and stupid that they would dogmatize something in the 19th century that had been condemned as heresy in the sixth?