CFv6 not sending email when file is attached

Hi,

I have 3 forms on a website, two of them have only text fields and are being sent the right way.
But one of the forms has the file upload element. I see the file in my server but i don't receive any email, the debug code shows this:

Array
(
    [chronoform] => form-formacao-pt
    [event] => submit
    [Nome] => asdsadas
    [email] => test@teste.com
    [file10] => 20170711092952_screenshot-at-jun-30-10-13-09.png
    [Mensagem] => test message test
    [enviar] => 
    [language] => pt-PT
    [Itemid] => 189
    [option] => com_content
    [lang] => pt-PT
    [view] => article
    [id] => 23
    [ark_inine_enabled] => 1
    [arkoption] => com_content
)
Array
(
    [upload9] => Array
        (
            [path] => /var/www/html/TBM/files/
            [cv] => Array
                (
                    [extensions] => Array
                        (
                            [0] => pdf
                            [1] => png
                            [2] => jpg
                        )

                    [info] => File is not present.
                )

            [file10] => Array
                (
                    [extensions] => Array
                        (
                            [0] => jpg
                            [1] => png
                            [2] => gif
                            [3] => pdf
                            [4] => doc
                            [5] => docx
                            [6] => txt
                            [7] => zip
                        )

                    [saved] => 1
                )

            [var] => Array
                (
                    [file10] => Array
                        (
                            [path] => /var/www/html/TBM/files/20170711092952_screenshot-at-jun-30-10-13-09.png
                            [filename] => 20170711092952_screenshot-at-jun-30-10-13-09.png
                            [name] => Screenshot at Jun 30 10-13-09.png
                            [size] => 164683
                        )

                )

        )

    [email2] => Array
        (
            [recipients] => Array
                (
                    [0] => ricardocostacoutinho@gmail.com
                )

            [subject] => TBM Website - Formulário de candidatura preenchida
            [body] => <h2>Nova candidatura recebida</h2>
<p>Foi preenchido o formulário de recrutamento na versão portuguesa com os seguintes dados:</p>
<table width="100%" cellpadding="5" cellspacing="3" border="0" class="ui table"><tr><td width="30%" valign="top" align="right"><strong>Nome</strong></td><td width="70%" valign="top" align="left">asdsadas</td></tr><tr><td width="30%" valign="top" align="right"><strong>Email</strong></td><td width="70%" valign="top" align="left">test@teste.com</td></tr><tr><td width="30%" valign="top" align="right"><strong>Mensagem</strong></td><td width="70%" valign="top" align="left">test message test</td></tr></table>
            [files] => Array
                (
                    [0] => field10
                    [1] => /var/www/html/TBM/files/20170711092952_screenshot-at-jun-30-10-13-09.png
                )

            [from_name] => TBM
            [from_email] => ricardocostacoutinho@gmail.com
            [reply_name] => TBM
            [reply_email] => ricardocostacoutinho@gmail.com
            [result] => the Mail could not be sent.
            [var] => 
        )

)

"the Mail could not be sent." but i can't understand why, the file is on my server and everything seems fine in my configurations. My configurations:

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