Works in Test, not in Live; tables not connected in the ElastiCube

Hello friends-

I'm using a dashboard for first time attendees that I got from another thread. Worked great in my last job. Here in new job, it works great in test for some reason, but I can't get it to work in live. I get this error. Is there an easy fix on this? Having two tables not connected in the ElastiCube sounds perilous. 

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