svm_model <- svm(response ~ ., data = train_data, kernel = "radial", probability = TRUE) Erreur dans contrasts<-(*tmp*, value = contr.funs[1 + isOF[nn]]) : les contrastes ne peuvent être appliqués qu'aux facteurs ayant au moins deux niveaux.

I got this error message trying to run SDM with SVM in R Had anyone here experienced same before?

svm_model <- svm(response ~ ., data = train_data, kernel = "radial", probability = TRUE) I used this command trying to train the model