请修改以下英文句子中的语法错误并解释错误所在位置。"She don't like pizza." 
 
"She don't like pizza."
The correct sentence is: "She doesn't like pizza."

Error: The subject-verb agreement is incorrect. "She" is a singular subject, and therefore requires a singular verb, which is "doesn't" (contraction of "does not"). "Don't" is the contraction of "do not", which is plural, and hence, is not appropriate for a singular subject.