when on click try to create subweb, it gives me error

Question

This function works fine,

SP.SOD.executeFunc('sp.js', 'SP.ClientContext', loadCurrentWeb);

but when I put it in,

function AddNewSubWebNow() {
    SP.SOD.executeFunc('sp.js', 'SP.ClientContext', loadCurrentWeb);
}

it gives me,

Unexpected response from server. The status code of response is '0'. The status text of response is ''.