You asked, "what is wrong with this line?" The answer is, "nothing is wrong with this line."
Other than the fact you don't need to escape the apostrophe, there's nothing wrong with the code, unless it's your French, which I don't speak fluently, or much at all. (I see "thanks for your submission, or somesuch....)
I suggest that you check the server error logs, etc., to see what up, because the line you posted shouldn't be causing a problem with any standard configuration of which I'm aware ....