Error codes popping up on new level not my old one

I keep getting this error code for the keypad when I finish the puzzle.

Blueprint Runtime Error: “Accessed None trying to read property CallFunc_Array_Get_Item”. Node: Set Material Graph: ToggleActivation Function: Toggle Activation Blueprint: BP_Keypad_with_Lights

I go to look at the code and I don’t see anything wrong with it. Like the last solved question I had, this is on a new level and not my white box testing level.

The error leads me to the highlighted “set material” where the M_buttonOff is at. (edited)

The hole system is built off of Halbots keypad puzzle.
Worked fine on the white box test level, moved it over to my actual game level and the errors started from there.

I figured the problem out!