The answer to your question would be that the error in this sentence is a pronoun-antecedent number agreement error. The pronoun "their" refers back to the NP "the team". However, the NP subject is singular.
The sentence in question is an example of the use of singular they. Singular they is the use of the pronoun they or any of its derivative forms (them, their, theirs, and themselves) as a gender-neutral singular pronoun.