Problem extracting getblocks() data from Pixy 2

I have been working to create a color tracking robot that will be able to follow an object based on if it matches one of the signatures stored in the Pixy. I am using the Pixy version 2 and the Arduino Mega. However when I run the Hello World sample code stored in the pixy library I receive no data in the serial monitor aside from the starting message. What do I need to do in order to get the getblocks function to return data.

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