function sendFeedbackToAmoCrm(array $arFields, array $arResult, $assembly, int $offerId, string $pathPdf = '', string $pathExcel = ''): array
{
    if (($access_token = getAccessToken()) === null) {
        return [];
    }
    $productText = '';
    foreach ($arResult['BASKET_ITEM_RENDER_DATA'] as $item) {
        $productText .= " - " . $item['NAME'] . ", " . $item['QUANTITY'] . " шт., на сумму: " . $item['SUM_FULL_PRICE'] . " \r\n";
    }
    $data = [
        [
            'source_name' => $arFields['TITLE'],
            'source_uid' => 'buy',
            'pipeline_id' => AMOCRM_PIPELINE_ID,
            "_embedded" => [
                "leads" => [
                    [
                        'name' => $arFields['TITLE'],
                        "price" => $arResult['allSum'],
                        "custom_fields_values" => [
                            [
                                "field_code" => '_YM_UID',
                                "values" => [["value" => ($arFields['YACLIENTID'] ?? '')]]
                            ],
                            [
                                "field_code" => 'YCLID',
                                "values" => [["value" => ($arFields['YACLIENTID'] ?? '')]]
                            ],
                            [
                                "field_code" => 'UTM_SOURCE',
                                "values" => [["value" => getUtmInCookie('utm_source')]]
                            ],
                            [
                                "field_code" => 'UTM_MEDIUM',
                                "values" => [["value" => getUtmInCookie('utm_medium')]]
                            ],
                            [
                                "field_code" => 'UTM_CAMPAIGN',
                                "values" => [["value" => getUtmInCookie('utm_campaign')]]
                            ],
                            [
                                "field_code" => 'UTM_TERM',
                                "values" => [["value" => getUtmInCookie('utm_term')]]
                            ],
                            [
                                "field_code" => 'UTM_CONTENT',
                                "values" => [["value" => getUtmInCookie('utm_content')]]
                            ],
                            [
                                "field_code" => 'UTM_REFERRER',
                                "values" => [["value" => getUtmInCookie('utm_referrer')]]
                            ],
                            [
                                "field_id" => 1673151,
                                "values" => [["value" => getUtmInCookie('utm_source')]]
                            ],
                            [
                                "field_id" => 1673153,
                                "values" => [["value" => getUtmInCookie('utm_medium')]]
                            ],
                            [
                                "field_id" => 1673155,
                                "values" => [["value" => getUtmInCookie('utm_campaign')]]
                            ],
                            [
                                "field_id" => 1672501,
                                "values" => [["value" => (string)($arFields['CITY'] ?? '')]]
                            ],
                            [
                                "field_id" => 1674031,
                                "values" => [["value" => (string)($arFields['ADRESS'] ?? '')]]
                            ],
                        ],
                    ]
                ],
                "contacts" => [
                    [
                        "first_name" => $arFields['EMAIL'],
                        "custom_fields_values" => [
                            [
                                "field_code" => "EMAIL",
                                "values" => [[
                                    "enum_code" => "WORK",
                                    "value" => $arFields['EMAIL'],
                                ]]
                            ],
                            [
                                "field_code" => "PHONE",
                                "values" => [[
                                    "enum_code" => "WORK",
                                    "value" => $arFields['PHONE']
                                ]]
                            ],
                        ]
                    ]
                ]
            ],
            "metadata" => [
                "ip" => getUserIP(),
                "form_id" => "buy",
                "form_sent_at" => time(),
                "form_name" => "Коммерческое предложение",
                "form_page" => "https://clever-place.ru/",
                "referer" => ($_SERVER['HTTP_REFERER'] ?? '')
            ]
        ]
    ];
    $sendResult = amoCrmSend("/api/v4/leads/unsorted/forms", $data, $access_token);
    $leadId = (int)(
        $sendResult['_embedded']['unsorted'][0]['_embedded']['leads'][0]['id']
        ?? 0
    );
    if ($leadId > 0) {
        $noteText = "Коммерческое предложение №{$offerId}\n";
        $noteText .= "Состав:\n" . $productText . "\n";
        $noteText .= "Город: " . ($arFields['CITY'] ?? '') . "\n";
        $noteText .= "Адрес доставки: " . ($arFields['ADRESS'] ?? '') . "\n";
        if ($pathPdf && file_exists($pathPdf)) {
            $pdfUrl = 'https://clever-place.ru' . str_replace($_SERVER['DOCUMENT_ROOT'], '', $pathPdf);
            $noteText .= "PDF: " . $pdfUrl . "\n";
        }
        if ($pathExcel && file_exists($pathExcel)) {
            $excelUrl = 'https://clever-place.ru' . str_replace($_SERVER['DOCUMENT_ROOT'], '', $pathExcel);
            $noteText .= "Excel: " . $excelUrl . "\n";
        }
        amoCrmSend(
            "/api/v4/leads/{$leadId}/notes",
            [[
                "note_type" => "common",
                "params" => [
                    "text" => $noteText
                ]
            ]],
            $access_token
        );
    }
    return $sendResult ?: [];
}<pre>[RuntimeException] 
Could not start session because headers have already been sent. &quot;/home/bitrix/ext_www/clever-place.ru/local/php_interface/functions.php&quot;:1. (0)
/home/bitrix/ext_www/clever-place.ru/bitrix/modules/main/lib/session/session.php:115
#0: Bitrix\Main\Session\Session-&gt;start
	/home/bitrix/ext_www/clever-place.ru/bitrix/modules/main/lib/session/kernelsessionproxy.php:42
#1: Bitrix\Main\Session\KernelSessionProxy-&gt;start
	/home/bitrix/ext_www/clever-place.ru/bitrix/modules/main/include.php:227
#2: require_once(string)
	/home/bitrix/ext_www/clever-place.ru/bitrix/modules/main/include/prolog_before.php:14
#3: require_once(string)
	/home/bitrix/ext_www/clever-place.ru/bitrix/modules/main/include/prolog.php:10
#4: require_once(string)
	/home/bitrix/ext_www/clever-place.ru/bitrix/header.php:1
#5: require(string)
	/home/bitrix/ext_www/clever-place.ru/catalog/index.php:1
#6: include_once(string)
	/home/bitrix/ext_www/clever-place.ru/bitrix/modules/main/include/urlrewrite.php:159
#7: include_once(string)
	/home/bitrix/ext_www/clever-place.ru/bitrix/urlrewrite.php:2
</pre>