Function stop working

Hi,
I’m experience some issue… I had configured before and it was working. After 3 months it has stopped like magic!
Please enter in the following link: https://altodevalongo.com/reservar/

Can you please help me understanding what is wrong?
Hi, I’m experience some issue… I had configured before and it was working. After 3 months it has stopped like magic! Can you please help me understanding what is wrong?
THANK YOU

Here is my code:

<div class="envelopa-formulario">
<div class="formulario-item-50 item-esquerda">Nome<span style="color:red;">*</span> [text* first-name]</div>
<div class="formulario-item-50">E-mail [email contacto]</div>
<div class="clearfix"></div>

<div class="formulario-item-25 item-esquerda">Data de Check-In <span style="color:red;">*</span>[date* data min:today]</div>
<div class="formulario-item-25 item-esquerda">Hora <span style="color:red;">(a partir das 18h00)*</span>[select* hora include_blank "18:00" "19:00" "20:00" "21:00" "22:00" "23:00" "24:00"]</div>
<div class="formulario-item-50">Suíte escolhida<span style="color:red;">*</span> [select* suite include_blank "Suite Deluxe" "Suite Jacuzzi Plus" "Suite Jacuzzi Lux" "Suite Grey" "Suite Classica" "Suite Eros" "Suite Premium" "Suite Varao" "Suite Jacuzzi" "Quarto De Hotel"]</div>
<div class="clearfix"></div>

<div class="formulario-item-50 item-esquerda">Número de Horas<span style="color:red;">*</span> [select* horas include_blank "12" "16" "24"]</div>
<div class="formulario-item-50">Número de Pessoas<span style="color:red;">*</span> [number* pessoas min:1 max:4]</div>
<div class="clearfix"></div>

<div class="formulario-item-100">Pack Extra <span style="color:red;">(O pack decorativo é obrigatório e tem um custo de 20€)</span>[checkbox extra use_label_element "Pack Compromisso" "Pack Plus" "Kit Erótico" "Kit Bondage" "Kit Bondage Ultimate" "Pack Personalizado"]</div>
<div class="formulario-item-100">Mensagem  [textarea your-message x4]</div>

[calculation valor_suites cf7-hide "fn_php(

$s=$_POST{'suite'};
$h=$_POST{'horas'};

$quartos{'Suite Deluxe'}{'12'}=55;
$quartos{'Suite Deluxe'}{'16'}=65;
$quartos{'Suite Deluxe'}{'24'}=95;

$quartos{'Suite Jacuzzi Plus'}{'12'}=100;
$quartos{'Suite Jacuzzi Plus'}{'16'}=120;
$quartos{'Suite Jacuzzi Plus'}{'24'}=200;

$quartos{'Suite Jacuzzi Lux'}{'12'}=100;
$quartos{'Suite Jacuzzi Lux'}{'16'}=120;
$quartos{'Suite Jacuzzi Lux'}{'24'}=200;

$quartos{'Suite Grey'}{'12'}=100;
$quartos{'Suite Grey'}{'16'}=120;
$quartos{'Suite Grey'}{'24'}=200;

$quartos{'Suite Classica'}{'12'}=50;
$quartos{'Suite Classica'}{'16'}=60;
$quartos{'Suite Classica'}{'24'}=95;

$quartos{'Suite Eros'}{'12'}=50;
$quartos{'Suite Eros'}{'16'}=60;
$quartos{'Suite Eros'}{'24'}=95;

$quartos{'Suite Premium'}{'12'}=55;
$quartos{'Suite Premium'}{'16'}=65;
$quartos{'Suite Premium'}{'24'}=95;

$quartos{'Suite Varao'}{'4'}=50;
$quartos{'Suite Varao'}{'12'}=60;
$quartos{'Suite Varao'}{'16'}=65;
$quartos{'Suite Varao'}{'24'}=95;

$quartos{'Suite Jacuzzi'}{'12'}=95;
$quartos{'Suite Jacuzzi'}{'16'}=110;
$quartos{'Suite Jacuzzi'}{'24'}=185;

$quartos{'Quarto de Hotel'}{'12'}=50;
$quartos{'Quarto de Hotel'}{'16'}=60;
$quartos{'Quarto de Hotel'}{'24'}=95;

return $quartos{$s}{$h};

)"]
<div class="formulario-item-100-2"><span style="float:left;line-height: 37px;font-size: 22px;color: red;font-weight: 600;">Resumo do pre?o  </span></div>
<div class="formulario-item-preco-25">[variable preco_extra cf7-hide "extra:" "Pack Compromisso 20" "Pack Plus 40" "Kit Erótico 25" "Kit Bondage 25" "Kit Bondage Ultimate 55" "Pack Personalizado 0" "default 0"][calculation calculation-173 class:currency init:0 "valor_suites + preco_extra + 20"]<span style="float:left;line-height: 37px;font-size: 22px;color: red;font-weight: 600;">€</span></div>
[calculate_button calculate_button-927 cf7-hide autocalc]

</div>
<div style="width:100%;text-align:center; float:left;">[submit "Enviar por Whatsapp"]</div>

The page I need help with: [log in to see the link]