Missing Label even though Label was set in Set Role Operator?

a3416

I keep getting a Missing Label sign pop up even though I'm sure I set the "rating" as the label in the Set Role operator. The other data source is called ChicagoBoothML/DATA___DatingAgency on Git Hub (the gender.dat). Any help would be really appreciated.

ClaudioKeck

Could you please share the Process XML, than I could take a look in more Detail. 

See this article about how to set up the User k-NN / LAbel for it 
https://nickgreenquist.github.io/blog/datascience/2018/03/02/recommender-system-rapid-miner.html