Error filtering template: Notice: Undefined variable: pro_price in

Error filtering template: Notice: Undefined variable: pro_price in
/Magento_Catalog/templates/product/widget/new/content/categories_shop.phtml on line 112

i’m getting this error even if comments or remove pro_price variable.
code where i’m getting this error ,its comes after deleting most of the products from catalog. before this was working fine. any suggestion?
this small code from file

$type = 'widget-new-grid';
$categoryProducts = $category1->getProductCollection()->addAttributeToSelect('*');                             
foreach ($categoryProducts as $product) {
     $pro_price=$block->getProductPriceHtml($product, $type);
}