Rstudio, sensomine R packges JAR() error

I am trying to perform a penalty analysis using SensoMineR pagkges, JAR(). But it does not work well.
For some reason, every time I type in this code for my data it says:
"Error in relevel.default(x[, i], jarlevel) :
'relevel' only for (unordered) factors".

I think typed in the code below but I am sure the instructions manual is not telling me a step that I need to do.

I think we need to see your code and some sample data.

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