Google products plugin site URL missing in feed

-- HikaShop version -- : 5.1.1
-- Joomla version -- : 4.4.8
-- PHP version -- : 8.1.27

Hi,
In this plugin on line 481 there is this line

"\t\t".'<link><![CDATA[ '.$siteAddress.' ]]></link>'."\n"."\n";

"\t\t".'<link><![CDATA[ '.$this->siteAddress.' ]]></link>'."\n"."\n";

$xml .= "\t".'<g:'.$name.'>'.htmlspecialchars($siteAddress.$this->main_uploadFolder_url.(ltrim($image->file_path,'/'))).'</g:'.$name.'>'."\n";

$xml .= "\t".'<g:'.$name.'>'.htmlspecialchars($this->siteAddress.$this->main_uploadFolder_url.(ltrim($image->file_path,'/'))).'</g:'.$name.'>'."\n";

FIXED, after this 2 changes, the feed is good and can be parsed corectly

Is there any conection with that php warning?
PHP Warning: Undefined variable $thi in plugins/hikashop/google_products/google_products.php on line 481
PHP Warning: Attempt to read property "siteAddress" on null in /plugins/hikashop/google_products/google_products.php on line 481

Using hika 5.1.5