question about error

hi
i am trying to work with sunfounder RFID learning kit v2.0 for arduino and also linked this program with arduino which i downloaded it but there is and error with all lessons when this 12C LCD1602 is used at lesson 4 and all others when is this device. when i copy code and paste it , it says error compilling for bord arduino/genoino uno.
compillation terminated

exit status 1
error compilling for bord arduino/genoino uno.

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