Package check result: ERROR

Check: examples, Result: ERROR
  Running examples in ‘flevr-Ex.R’ failed
  The error most likely occurred in:
  
  > base::assign(".ptime", proc.time(), pos = "CheckExEnv")
  > ### Name: extract_importance_xgboost
  > ### Title: Extract the learner-specific importance from an xgboost object
  > ### Aliases: extract_importance_xgboost
  > 
  > ### ** Examples
  > 
  > ## No test: 
  > data("biomarkers")
  > # subset to complete cases for illustration
  > cc <- complete.cases(biomarkers)
  > dat_cc <- biomarkers[cc, ]
  > # use only the mucinous outcome, not the high-malignancy outcome
  > y <- dat_cc$mucinous
  > x <- as.matrix(dat_cc[, !(names(dat_cc) %in% c("mucinous", "high_malignancy"))])
  > feature_nms <- names(x)
  > set.seed(20231129)
  > xgbmat <- xgboost::xgb.DMatrix(data = x, label = y)
  > # get the fit, using a small number of rounds for illustration only 
  > fit <- xgboost::xgboost(data = xgbmat, objective = "binary:logistic", nthread = 1, nrounds = 10)
  Warning in throw_err_or_depr_msg("Parameter '", match_old, "' has been renamed to '",  :
    Parameter 'data' has been renamed to 'x'. This warning will become an error in a future version.
  Error in xgboost::xgboost(data = xgbmat, objective = "binary:logistic",  : 
    argument "y" is missing, with no default
  Calls: <Anonymous> -> process.y.margin.and.objective -> NROW
  Execution halted