Override namebox - Error

Hello, I want to ask how I can fix the following problem. I override the file /administrator/components/com_hikamarket/types/namebox.php but I get multiple errors like this: Class "hikamarketNameboxType" not found. All other overrides work fine any ideas how to fix it. I want to replace oTree image folder path by changing this code

$namebox_options = array(
			'mode' => $typeConfig['mode'],
			'img_dir' => HIKAMARKET_IMAGES, //must be replaced
			'map' => $map,
			'min' => $shopConfig->get('namebox_search_min_length', 3)
		);

<?php
echo $this->nameboxType->display('data[product][categories]',$categories,hikamarketNameboxType::NAMEBOX_MULTIPLE,'category',array('delete'=>true,'sort'=>true,'root'=>$this->vendorCategories,'default_text'=>JText::_('HIKA_NONE')));
 ?>

HikaMarket v4.0.0
/templates/template_name/html/com_hikamarket/administrator/types/namebox.override.php
the namebox.php file is renamed to namebox.override.php and class hikamarketNameboxType renamed to class hikamarketNameboxTypeOverride, without any other modifications.
When, for example, I want to add a product (HikaMarket Front-end) and not only there, it will display the above error.

Hi, thanks for the reply. I have found a solution to the problem. Of course, I will renew my licenses as soon as possible - I don't need a product that is not supported. I've made a few changes refining some of the code as described above and there are no issues, it's only this code that I'm having issues with that's why I'm contacting you as well. It might be some kind of incompatibility with Joomla 4 because I'm testing on it now. Check this issue though.