error in single trait analysis

[LizaAndrews]

Hello,
When I run the code for the single trait analysis, I get the following error message:
Warning message:
The facets argument of facet_grid() is deprecated as of ggplot2 2.2.0.
ℹ Please use the rows argument instead.
ℹ The deprecated feature was likely used in the agriutilities package.
Please report the issue at https://github.com/AparicioJohan/agriutilities/issues.
This warning is displayed once every 8 hours.

Kind regards,
Liza