после того как переименовал папку с сайтом, выдает вот такую ошибку. подскажите пожалуйста

Error code: Fatal error: Namespace declaration statement has to be the very first statement in the script HTTP Fatal error: Namespace declaration statement has to be the very first statement in the script (GET /settings/plugin)

вот код самого plugin:

<?php

namespace Plugins\Suppliers;

defined('PIMPORT') or die('Error access');

use Infr;

/**
 * Class Plugin
 * @package Plugins\Suppliers
 */
class Plugin extends Infr\Plugin {

    /** @var string */
    protected $_name = 'Прайс-листы поставщиков';

    /** @var string */
    protected $_description = 'XLS прайс-листы поставщиков.';

    /** @var bool */
    protected $_menu = true;

    /** @var string */
    protected $_menuName = 'Прайс-листы поставщиков';

    /**
     * @param \Model\Plugin $plugin
     * @param \Base $core
     * @return mixed
     */
    public function settings(\Model\Plugin $plugin, \Base $core) {
        $core->push('js_files', 'plugin_suppliers.js');

        $settings = $this->_getSettings($plugin->id);

        $supplierStorage = new Model\Storage();
        $supplierCollection = $supplierStorage->getSuppliers();

        if ($core->get("POST.upload")) {
            $supplierId = $core->get("POST.id");
            $coefficient = $core->get("POST.coefficient");

            /** @var Model\Supplier $supplierItem */
            $supplierItem = $supplierCollection->find($supplierId);

            $settings['coefficient_' . $supplierItem->id] = $coefficient;
            $this->_saveSettings($plugin->id, $settings);

            $supplierStorage->setConfig($supplierItem, $settings);
            $supplierStorage->generateSupplierPrice($supplierItem, $core->get("FILES.price"));

            Infr\Request::instance()->redirect($core->get("BASE") . '/settings/plugin?id=' . $plugin->id . '&supplier='
                . rawurlencode($supplierId));
        }

        if ($core->get("GET.download_price")) {
            $supplierId = $core->get("GET.download_price");

            /** @var Model\Supplier $supplierItem */
            $supplierItem = $supplierCollection->find($supplierId);

            if ($supplierItem) {
                $supplierStorage->setPrice($supplierItem);
                \Web::instance()->send($supplierItem->price->file);
                exit();
            }

            $core->error(404);
        }

        if ($core->get("GET.remove_price")) {
            $supplierId = $core->get("GET.remove_price");

            /** @var Model\Supplier $supplierItem */
            $supplierItem = $supplierCollection->find($supplierId);
            if ($supplierItem) {
                $supplierStorage->removePriceFile($supplierItem);
            }

            Infr\Request::instance()->redirect($core->get("BASE") . '/settings/plugin?id=' . $plugin->id . '&supplier='
                . rawurlencode($supplierId));
        }

        $supplierId = $core->get("GET.supplier");

        $supplierStorage->setPriceToCollection($supplierCollection);
        $supplierStorage->setConfigToCollection($supplierCollection, $settings);

        $core->mset(array(
            'CURRENT_SUPPLIER' => $supplierId,
            'count_items' => $supplierCollection->count(),
            'supplier_items' => $supplierCollection->toArray(),
            'PLUGIN_SETTINGS' => $settings,
            'PLUGIN' => $plugin->toArray(),
            'PHP_INI_MAX_FILE_UPLOAD' => ini_get('max_file_uploads'),
        ));
        return Infr\Template::instance()->render($this->_templateFolder() . DS . 'settings.html');
    }

    /**
     * @param \Model\Plugin $plugin
     * @return mixed|void
     * @throws \Exception
     */
    public function install(\Model\Plugin $plugin) {

    }

    /**
     * @param \Model\Plugin $plugin
     * @return mixed|void
     */
    public function uninstall(\Model\Plugin $plugin) {

    }

}