I am using R on Sagemaker notebook to train build in xgboost model, but could not pass in inputs. It says: CreateTraining job error or Cannot format input ['{"X1": c("python.builtin.ValueError", "python.builtin.Exception", "python.builtin.BaseException", "python.builtin.object", "error", "condition"), py_object = )) It seems expect str, csv but I could not convert dataframe read from s3 - csv files. It would not take json format input for train/validation or inputs. Anyone knows? A. I TRIED ALMOST ALL, ALSO STRING OR CSV FORMAT BUT IN VAIN FOR ESTIMATOR.FIT INPUTS PARAMETERS Continue reading...