CSV@0.3.1 is working fine on my Win 10 PC with Julia 1.0. When I do package update it move to CSV@0.4.0 and also removes InternedStrings package. However CSV fails to compile. When I revert back to CSV@0.3.1 (with InternedStrings package reinstalled) and its works fine.
If you do up again, it should install fine now; there was a mistake in the 0.4.0 release where a dependency was missing in the REQUIRE file, so it didn’t get “translated” to the General registry validly. But release 0.4.1 quickly followed with the fix, so it should be all good now.