Guest checkout: Get 'parsererror' when creating Invoice Address

[titanotam]

Hi all,

 

When using the Guest checkout, entered all invoice address, click save and I got the "parsererror" displayed.

 

I tried to input again, but leave invoice address empty (uncheck the "Please use the another address for invoice"), everything ok. 

 

XMLHttpRequest: 

{"readyState":4,"responseText":"string(10) \"controller\"\n","status":200,"statusText":"OK"} 

errorThrown: 

"SyntaxError: Unexpected token s
    at Object.parse (native)
    at n.parseJSON (http://adorastore.com/js/jquery/jquery-1.11.0.min.js:4:16140)
    at e.parseJSON (http://adorastore.com/js/jquery/jquery-migrate-1.2.1.min.js:2:2943)
    at Qc (http://adorastore.com/js/jquery/jquery-1.11.0.min.js:4:18521)
    at x (http://adorastore.com/js/jquery/jquery-1.11.0.min.js:4:21926)
    at send.b (http://adorastore.com/js/jquery/jquery-1.11.0.min.js:4:26298)
    at Object.send (http://adorastore.com/js/jquery/jquery-1.11.0.min.js:4:26402)
    at Function.n.extend.ajax (http://adorastore.com/js/jquery/jquery-1.11.0.min.js:4:21703)
    at saveAddress (http://adorastore.com/themes/default-bootstrap/js/order-opc.js:685:4)
    at Object.$.ajax.success (http://adorastore.com/themes/default-bootstrap/js/order-opc.js:226:13)"

Can someone explain me about this?

 

Thanks 

[titanotam]

Someone give me a hand please!