Print Start shows a warning about incomplete Slicer configuration.

I started my first print after updating to RatOS 2.1-RC3 (Printing a ringing tower to calculate input shaping parameters) and received a warning message in the console as follows:

Incomplete Slicer Configuration detected
Your slicer gcode settings are not up to date.
Learn more about the RatOS Slicer Configuration

The screenshot of my console is shown below.

I did a little digging and I wonder if this part of the START_PRINT macro is the cause. The Start Print G-Code, per the RatOS documentation passes variables X0, X1, Y0, and Y1. There is no FIRST_X, or FIRST_Y parameter being passed. Should this be changed to read X0 and Y0 instead of FIRST_X and FIRST_Y?