How to resolve require is undefined issue (caught ReferenceError: require is not defined)

I am getting an issue on a single page (caught ReferenceError: require is not defined) on the below code. Please help me to resolve this issue. I am not sure where I am getting this issue I inspected some code then I found this one. due to this CSS not loading but it doesn’t shown me any css issue. Can anyone help me out on this.

    < ?php
$helper = $this->helper('WebkulB2BMarketplaceHelperData');
$helper->getCompanyName();
$baseUrl = $helper->getBaseUrl()."pub/media/b2b/";
$regions = $helper->getAllRegions();
$corporateAddress = $helper->getCorporateAddress();
$operatioanlAddress = $helper->getOperatioanlAddress();
$defultLogo = $helper->getDefaultLogo();
$sellerLogo = $helper->getSellerLogo();
$supplier = $block->getPersistentData();
if (empty($supplier)) {
$supplier = $helper->getCurrentSupplier();
}
?>


< ?php echo $block->getBlockHtml('seller.formkey')?>
< ?php echo $block->getBlockHtml('formkey') ?>
< ?php echo __('Company Logo') ?>





< ?php echo __("Reset Logo"); ?>
< ?php echo __("Remove Logo"); ?>

 < ?php echo __('Company Banner') ?> 

< ?php
$bannerpic = $supplier['banner_pic'];
if ($bannerpic && !$supplier['is_default_banner']) { ?>




< ?php
} else { ?>

< ?php
} ?>

< ?php echo __('Company Name') ?>


< ?php echo __('Company Tagline') ?>


< ?php echo __('Registered In') ?>


< ?php echo __('Company Team Size') ?>


< ?php echo __('Certification') ?>


< ?php echo __("Operational Address"); ?>

< ?php echo __("Country"); ?>
< ?php echo $helper->getCountryHtmlSelect($operatioanlAddress['country'], "operational_country", "supplier-operational-country"); ?>

< ?php echo __("State"); ?>
< ?php if (array_key_exists($operatioanlAddress['country'], $regions)): ?>
" id="supplier-operational-state" name="operational_state" value="< ?php echo $operatioanlAddress['region'] ?>">

< ?php else: ?>
" id="supplier-operational-state" name="operational_state" value="< ?php echo $operatioanlAddress['region'] ?>">

< ?php endif; ?>

< ?php echo __("City"); ?>
" id="supplier-operational-city" name="operational_city" value="< ?php echo $operatioanlAddress['city'] ?>">

< ?php echo __("Address Line"); ?>
" id="supplier-operational-address" name="operational_address" value="< ?php echo $operatioanlAddress['street'] ?>">

< ?php echo __("Zip/Postal code"); ?>
" id="supplier-operational-postcode" name="operational_postcode" value="< ?php echo $operatioanlAddress['postcode'] ?>">

< ?php echo __("Phone Number"); ?>
" id="supplier-operational-phone" name="operational_phone" value="< ?php echo $operatioanlAddress['telephone'] ?>">

< ?php echo __("Corporate Address"); ?>

< ?php echo __("Country"); ?>
< ?php echo $helper->getCountryHtmlSelect($corporateAddress['country'], "corporate_country", "supplier-corporate-country"); ?>

< ?php echo __("State"); ?>
< ?php if (array_key_exists($corporateAddress['country'], $regions)): ?>
" id="supplier-corporate-state" name="corporate_state" value="< ?php echo $corporateAddress['region'] ?>">

< ?php else: ?>
" id="supplier-corporate-state" name="corporate_state" value="< ?php echo $corporateAddress['region'] ?>">

< ?php endif; ?>

< ?php echo __("City"); ?>
" id="supplier-corporate-city" name="corporate_city" value="< ?php echo $corporateAddress['city'] ?>">

< ?php echo __("Address Line"); ?>
" id="supplier-corporate-address" name="corporate_address" value="< ?php echo $corporateAddress['street'] ?>">

< ?php echo __("Zip/Postal code"); ?>
" id="supplier-corporate-postcode" name="corporate_postcode" value="< ?php echo $corporateAddress['postcode'] ?>">

< ?php echo __("Phone Number"); ?>
" id="supplier-corporate-phone" name="corporate_phone" value="< ?php echo $corporateAddress['telephone'] ?>">