It appears after reading through this site there has been some form of revamp of Appery recently which has caused quite a number of problems by the looks of it.
Another for me as a brand new member of only a few hours is the first tutorial and I will assume the rest of them in relation to the issue are out of date and refer to an earlier version of the software.
I am trying to do the first tutorial where you make a warehouse db list for three drinks and yet when I try and do the mapping to match the list with the database it won't work and the tutorial images show a screen which is now different.
I was attempting to evaluate Appery for use with my business with an aim to subscribe but have to say I am far removed from being anywhere near impressed. I think it's been foolish and short sighted to update your software version and not provide relevant tutorials.
Looks like I will have to move on and try the numerous amount of competitor offerings.