Simplify the following text for a Grade 6 native English-speaking person.
Original: However , problems with Mrs. Thurber about his salary , together with increasing recognition in Europe â '' he had been made an honorary member of the Gesellschaft der Musikfreunde in Vienna â '' and a remarkable amount of homesickness made him decide to return to Bohemia .
Simplified: He was also not being paid all his salary . He heard that he had been made an honorary member of the Gesellschaft der Musikfreunde in Vienna .