Hi @CheddahChase ,
It looks like maybe you typing in or copy/paste the expression; it needs to be entered as an expression.
In the field select expression and you can type in the expression you have BUT you need to replace 'field_7' with the dynamic content placeholder for the value.
You need it to look like this:
With your cursor in the field, click on fx icon
Type in your expression -- not including field_7 text. Place your cursor between the left parathesis and the comma, then click on dynamic values button.
In my example, I have "field_7" as a variable, yours will be the name of the column or field_7 (probably shows up as field_7 since you imported your list from excel).
After selecting the dynamic value, it shows up in my expression like this (again, yours will look slightly different).
Then press Save. It will look like this in your select action.
