Installing package e1071

Question

I am trying to use 'rfe' function from 'caret':

lmProfile <- rfe(x=trainData[, 0:(ncol(trainData)-1)], y=trainData$target,
             sizes = subsets,
             rfeControl = ctrl)

but I get the following error:

Error: package e1071 is required

I am running my code in Jupiter Notebook. I've installed both 'caret' and 'e1071' packages:

install.packages('e1071', dependencies=TRUE)
install.packages('caret', dependencies = TRUE)

I also tried the following in the terminal:

conda install -c r r-e1071 
conda install -c conda-forge r-e1071 
conda install -c conda-forge/label/gcc7 r-e1071 
conda install -c conda-forge/label/cf201901 r-e1071 
conda install -c conda-forge/label/cf202003 r-e1071

I always got the same error message.

Any suggestions?