Zend certified PHP/Magento developer

Exception #0: Warning: include(/var/www/html/vendor/magento/module-catalog/view/frontend/templates/product/view/attribute.phtml)

I am getting this error when I try to open to product catalog page in Magento 2.4.3 Custom theme?

Exception #0 (Exception): Warning: include(/var/www/html/vendor/magento/module-catalog/view/frontend/templates/product/view/attribute.phtml): failed to open stream: Permission denied in /var/www/html/vendor/magento/framework/View/TemplateEngine/Php.php on line 71

I set permission also using root.
cd /var/www/html/
find var generated vendor pub/static pub/media app/etc -type f -exec chmod g+w {} +
find var generated vendor pub/static pub/media app/etc -type d -exec chmod g+ws {} +
chown -R :www-data . # Ubuntu
chmod u+x bin/magento

Kindly can you please help me in this!