Help with Hackathon project - uistring.Error

Would anyone be willing to help me with this error for one of my students? It says - WARNING: Line: 28: setText() text parameter value (undefined) is not a uistring.ERROR: Line: 28: TypeError: Cannot read property ‘toString’ of undefined

Thank you in advance!

You are trying to display undefined where a string is required.

A couple reasons for that. One is calling filter() before you know what to filter on. Another is filtering on the artist name 1. Another is choosing a random artist based on lists of different lengths.