after install the github package, one of the function from the package in imports doesn't work

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#1

library(devtools)
devtools::install_github("XiaoxiaChampon/catfda")
catfdcluster(matrix(sample(c(0,1,2),100*250,replace=TRUE),nrow=100,ncol=250),seq(0,1,length=250),25,3,3,0.9,4,5,2,"happ")
#Error in aes(index, sort.dist.) : could not find function "aes"

in the description, I have imports ggplot2 and in my package, I used the function as follows ggplot2::ggplot()

other functions from packages inports are working, what went wrong for ggplot2?