In 1933, Anderson made her European debut in a concert at Wigmore Hall in London, where she was received enthusiastically. She spent the early 1930s touring throughout Europe where she did not encounter the racial prejudices she had experienced in America. In the summer of 1930, she went to Scandinavia, where she met the Finnish pianist Kosti Vehanen who became her regular accompanist and her vocal coach for many years. She also met Jean Sibelius through Vehanen after he had heard her in a concert in Helsinki. Moved by her performance, Sibelius invited them to his home and asked his wife to bring champagne in place of the traditional coffee. Sibelius commented to Anderson of her performance that he felt that she had been able to penetrate the Nordic soul. The two struck up an immediate friendship, which further blossomed into a professional partnership, and for many years Sibelius altered and composed songs for Anderson to perform. He created a new arrangement of the song "Solitude" and dedicated it to Anderson in 1939. Originally The Jewish Girl's Song from his 1906 incidental music to Belshazzar's Feast, it later became the "Solitude" section of the orchestral suite derived from the incidental music.  In 1934, impresario Sol Hurok offered Anderson a better contract than she previously had with Arthur Judson. He became her manager for the rest of her performing career and through his persuasion she came back to perform in America. In 1935, Anderson made her first recital appearance in New York at Town Hall, which received highly favorable reviews by music critics. She spent the next four years touring throughout the United States and Europe. She was offered opera roles by several European houses but, due to her lack of acting experience, Anderson declined all of those offers. She did, however, record a number of opera arias in the studio, which became bestsellers.  Anderson, accompanied by Vehanen, continued to tour throughout Europe during the mid-1930s. She visited Eastern European capitals and Russia and returned again to Scandinavia, where "Marian fever" had spread to small towns and villages where she had thousands of fans. She quickly became a favorite of many conductors and composers of major European orchestras. During a 1935 tour in Salzburg, the conductor Arturo Toscanini told her she had a voice "heard once in a hundred years".  In the late 1930s, Anderson gave about 70 recitals a year in the United States. Although by then quite famous, her stature did not completely end the prejudice she confronted as a young black singer touring the United States. She was still denied rooms in certain American hotels and was not allowed to eat in certain American restaurants. Because of this discrimination, Albert Einstein, a champion of racial tolerance, hosted Anderson on many occasions, the first being in 1937 when she was denied a hotel before performing at Princeton University. She last stayed with him months before he died in 1955.

Answer this question "Was there ever any conflicts?" by extracting the answer from the text above.
her stature did not completely end the prejudice she confronted as a young black singer touring the United States.