New MOS, Help!

Ok...

I have created two new Modes of Sale 

1. A new manager MOS that I have given web user access to that I can unlock with a source code on TNEW

2. A new member MOS that is connected to a web ranking and also has web user access on 

Both of these MOS appear to be triggering when tested, but when I attempt to access a performance from the event calendar the error message below is thrown  

I have checked:

  • MOS of sale dates 
  • MOS on performance 
  • User Group access 
  • Price type access
  • MOS Allocation 

I'm sure I'm missing something very simple, but I can't locate the missing piece in the help docs. Please help!