I am attempting to install WGCNA in R 4.2, but it is not successful. I tried running the following:

Error: package or namespace load failed for ‘WGCNA’ in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
 there is no package called ‘preprocessCore’

If you first install preprocessCore and then try again?

BiocManager::install("preprocessCore")
BiocManager::install("WGCNA")

If you receive errors please show the whole output including the command you tried and any messages/errors.