Error when after adding item to the basket

I recently updated the OXID from 4.7.6 to 4.9.9. Alongside the other problems that I resolved, there is one that cannot catch it.

When an item is added to basket, the system redirects to something like that:

shoname.com/index.php?cl=oxwarticledetails&anid=86eb2a3f46b4f7930bee76a3974cfedd&listtype=list&

and instead of loading the whole page, it loads only the product details in a plain html text. I found that if I replace cl=oxwarticledetails with cl=details it works.

Can someone help me about that

Try with default azure template, if it works there, you need to adjust your custom template to work with 4.9.

I tried with Azure theme, the same error occurs. Also I disabled all extensions modules to be sure that the error is not caused by some of them

Smarty errors often result in a Half rendered pages, can you check your Webserver Error log?

Whit vhost settings I specified to log server errors:

ErrorLog /var/log/apache2/shop-error.log

But nothing is loged there. Also i checked /log/EXCEPTION_LOG.txt which is empty.

In cofig file i set $this->iDebug = 0; or $this->iDebug = -1;

I cant see any error