L O L! I was thinking that was the issue! In reading the thread, I was just about to say something about this, based on the statement:
“The blinking light on the Victor doesn’t change color or pattern when we ENABLE/DISABLE the robot, it blinks at the same rate.”
The orange LED should stop blinking and remain SOLID ON when a Victor is enabled and neutral. When you said it kept blinking, that pointed directly to the PWM cable not being properly seated.
Sometimes you literally have to jiggle the crap out of the PWM cable in order for the connection to be true (sorry Al - sometimes you just have to get medieval on electrical components to get them to do your bidding) 
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Once the connection goes true, it tends to stay that way…unless the PWM cable wiggles loose. Once you know the PWM connection is good, HOT GLUE the PWM connector to the Victor housing to keep it in place - saves you a TON of headache later on!
3138 had this same problem this past build season when they called me kinda freaked out. They were about to throw their Victors out! They were not privy to the “Victor PWM cable shimmy”.