My basic segmented linear regression R-scripts give me the error below.
2 years ago, the same scripts were working fine so I suspect some change in the package.

I have a sf object with 2 columns, named fclass and geometry. I am interested in the fclass column. The fclass has several unique values. I convert this sf object to spatraster, I resample it and I perform a linear regression where I use another spatraster, called ntl, as my response (lm(ntl ~ road)).