He extended a brief visit to Dickens' home into a five-week stay, to the distress of Dickens' family

From Wikipedia. It is easy to view of our cultural ancestors through the lens of hagiography, to view them as almost demigods: however, they were just people, talented and brilliant perhaps but still just people. Subject to the same proneness to faux pas as ourselves, misreading of social cues, loss of perspective, etc.

In June 1847, Andersen paid his first visit to England and enjoyed a triumphal social success during the summer. The Countess of Blessington invited him to her parties where intellectual people could meet, and it was at one such party that he met Charles Dickens for the first time. They shook hands and walked to the veranda, about which Andersen wrote in his diary: "We had come to the veranda, I was so happy to see and speak to England's now living writer, whom I love the most."

The two authors respected each other's work and shared something important in common as writers: depictions of the poor and the underclass, who often had difficult lives affected both by the Industrial Revolution and by abject poverty. In the Victorian era there was a growing sympathy for children and an idealization of the innocence of childhood.

Ten years later, Andersen visited England again, primarily to meet Dickens. He extended a brief visit to Dickens' home at Gads Hill Place into a five-week stay, to the distress of Dickens' family. After Andersen was told to leave, Dickens gradually stopped all correspondence between them, to the great disappointment and confusion of Andersen, who had quite enjoyed the visit and never understood why his letters went unanswered.