Mailer Error: Could not instantiate mail function.

Hi there, somedays ago I've encountered this error on my website and I don't how to solve it. Can anyone help me ?

The code is this:

<div class="form-group gcore-form-row" id="form-row-2"><label for="text1" class="control-label gcore-label-left">Nome:</label>
<div class="gcore-input gcore-display-table" id="fin-text1"><input name="nome" id="text1" value="" placeholder="" maxlength="30" size="50" class="validate['required'] form-control A" title="" style="" data-inputmask="" type="text" /></div></div><div class="form-group gcore-form-row" id="form-row-4"><label for="text4" class="control-label gcore-label-left">Endereço electrónico:</label>
<div class="gcore-input gcore-display-table" id="fin-text4"><input name="text4" id="text4" value="" placeholder="" maxlength="" size="50" class="validate['required','email'] form-control A" title="" style="" data-inputmask="" type="text" /></div></div><div class="form-group gcore-form-row" id="form-row-6"><label for="text5" class="control-label gcore-label-left">Assunto:</label>
<div class="gcore-input gcore-display-table" id="fin-text5"><input name="text5" id="text5" value="" placeholder="" maxlength="20" size="50" class="validate['required'] form-control A" title="" style="" data-inputmask="" type="text" /></div></div><div class="form-group gcore-form-row" id="form-row-7"><label for="textarea6" class="control-label gcore-label-left">Mensagem:</label>
<div class="gcore-input gcore-display-table" id="fin-textarea6"><textarea name="textarea6" id="textarea6" placeholder="" rows="5" cols="48" class="validate['required'] form-control A" title="" style=""></textarea></div></div><div class="form-group gcore-form-row" id="form-row-8"><label for="file7" class="control-label gcore-label-left">Anexo:</label>
<div class="gcore-input gcore-display-table" id="fin-file7"><input name="file7" id="file7" class="form-control gcore-height-auto A" title="" style="" type="file" /></div></div><div class="form-group gcore-form-row" id="form-row-14"><label for="radio11" class="control-label gcore-label-left gcore-label-checkbox">Receber uma cópia ?</label>
<div class="gcore-input gcore-display-table" id="fin-radio11"><div class="gcore-multiple-column" id="fclmn13"><div class="gcore-radio-item" id="fitem10"><input name="radio11" id="radio119" value="0" class="A" title="" style="" type="radio" checked="checked" />
<label class="control-label gcore-label-checkbox" for="radio119">Não</label></div>
<div class="gcore-radio-item" id="fitem12"><input name="radio11" id="radio1111" value="1" class="A" title="" style="" type="radio" />
<label class="control-label gcore-label-checkbox" for="radio1111">Sim</label></div></div></div></div><div class="form-group gcore-form-row" id="form-row-15"><div class="gcore-input gcore-display-table" id="fin-button3"><input name="button3" id="button3" type="submit" value="Enviar" class="form-control A" style="" /></div></div>

Hello AndreScala,
I'm not a Chrono professional, but after checking your new post, I think that the following links may help:
Error: "Could not instantiate mail function"
P.S: I'm just an automated service😉

I saw your answer in another post and disn't helped.
Sry thks

Hi AndreScala,

It has nothing to do with the Form HTML. It is either a problem with the Mailer settings on your site, or with the way you have the Email addresses configured in your form.

If the forms were sending OK and now you get this message either you changed some setting or your web-host has, have you checked with them?

Bob