The failure on x::x was just to show you how a failure would printout. You can ignore it.

JSON loaded fine for you. On mine loading JSON also loads JSON::XS. Yours didnt.

Try the one below at Re: pl script in webserver and enter JSON::XS into the box. Add JSON::PP too. I bet it shows a failure on JSON::XS, that means you dont have JSON::XS. If it doesnt show a failure on JSON:PP use that instead.

Edit to add: Interesting that LWP::UserAgent didnt fail, but didnt add anything either, as if it was already loaded for some reason.