data labeled serious not showing in the traffic light plot

[akidpiras]

data set to "serious' in data frame now showing in the traffic light plot in my data frame specifically, while the function works completely normally with other data frames

I keep getting this message:
Warning messages:
1: Removed 18 rows containing missing values (geom_point()).
2: Removed 18 rows containing missing values (geom_point()).

this is the plot I get:

All the gray dots are supposed to be "serious"