Not able to read the csv files and every time it shows an fatal error

I think we need a bit more information. First hero are some suggestions on how to provide a reproducible example (reprex)

Screenshots are not ideal. However it looks like you have some version conflict. What version of R and RStudio are you using? At a guess install.load has installed packages that are newer than your version of R.

Can you supply the output of

sessionInfo()