I exported the site project and then I uploaded the project files using filezilla. Then I went to my website and it shows the "index of" page. How can I solve it? Please help me, for me is really...

I use Nicepage for as template of Joomla 4. Since the last update of Nicepage I get an error when I put a line in 'index.php'. I normally write this <?php $this->setGenerator('my name');...