我正在R中运行AUCRF进行功能选择，但它抛出错误

> object<-AUCRF(target~.,train)
Error in rank(rf$votes[, as.character(clase)]) : subscript out of bounds
 Data "train" is a dataframe,DV-Target is a factor and the all IDVs are integers.

如何纠正此错误
下面是代码：

library("AUCRF")
    train<-read.csv("train.csv") 
    train$target=factor(train$target)
    train<-data.frame(train)
    object<-AUCRF(target~.,train)

我尝试调试问题并PFB详细信息：
选项（错误=恢复）
对象〈-AUCRF（目标值~.，偏差）
排名错误（rf $votes [，as. character（clase）]）：下标越界

Enter a frame number, or 0 to exit   

1: AUCRF(target ~ ., dev)
2: AUC.randomForest(fitRF)
3: rank(rf$votes[, as.character(clase)])

Selection: 3
Called from: AUC.randomForest(fitRF)
Browse[1]> ls()                     
[1] "na.last"     "ties.method" "x"          
Browse[1]> x                                 
Error during wrapup: promise already under evaluation: recursive default argument reference or earlier problems?

这是什么错误？