* installing *source* package 'coursekata' ... ** package 'coursekata' successfully unpacked and MD5 sums checked ** using staged installation ** R ** data *** moving datasets to lazyload DB ** inst ** byte-compile and prepare package for lazy loading ** help *** installing help indices *** copying figures ** building package indices ** testing if installed package can be loaded from temporary location Error: package or namespace load failed for 'coursekata': .onAttach failed in attachNamespace() for 'coursekata', details: call: vapply(pkgs, get_key, character(1)) error: values must be length 1, but FUN(X[[1]]) result is length 2 Error: loading failed Execution halted ERROR: loading failed * removing 'd:/Rcompile/CRANpkg/lib/4.4/coursekata' * restoring previous 'd:/Rcompile/CRANpkg/lib/4.4/coursekata'