Made the changes and tried again and im still getting that error.
Hmmmm, just went back in and me to… but as you see in the recording it was working… hmmmmmm
yea its really werid… if you close the software and open it again and go strait to that it errors out every time. But if you do something else first like create a customer entity ticket then go to the tables it works fine.
OK, think might have it, to be honest your setup is quite messy and hard to follow 
sorry.
So after looking more generally through your setup found that your take order button on nav screen actually doesnt do anything…
See picture below, it should be navigation module to POS.
Working for me now…
oooohhhh yea im slowly been learning/setting up a system before i deploy it so i know i have got alot of cleanup to do.