Error in compileCode(f, code, language = language, verbose = verbose) : Compilation ERROR, function(s)/method(s) not created! Again

What happens if you first do a

Sys.setenv(LOCAL_LIBS = 'C:/R/win-library/4.0/rstan/lib/x64/libStanServices.a -L"C:/R/win-library/4.0/StanHeaders/libs/x64" -lStanHeaders -L"C:/R/win-library/4.0/RcppParallel/lib/x64" -ltbb')

?