Issue with SLogina and J4

Hello.

I noticed thwo issues with SLogin on my J4:

On frontpage:
Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /home/betty71/domains/betty71.pro-linuxpl.com/public_html/wduchu1/modules/mod_slogin/mod_slogin.php on line 81

On backend under users:

Fatal error: Access level to SloginViewUsers::setDocument() must be public (as in class Joomla\CMS\MVC\View\AbstractView) in /xxxxxxxxxxxx/public_html/wduchu1/administrator/components/com_slogin/views/users/view.html.php on line 64 FatalError HTTP 500 Whoops, looks like something went wrong.Compile Error: Access level to SloginViewUsers::setDocument() must be public (as in class Joomla\CMS\MVC\View\AbstractView)

• Exception
• Stack Trace

Symfony\Component\ErrorHandler\Error\FatalError
in  /home/betty71/domains/betty71.pro-linuxpl.com/public_html/wduchu1/administrator/components/com_slogin/views/users/view.html.php  (line 64)

1. Code:

       /**
2. Code:

        * Method to set up the document properties
3. Code:

        *
4. Code:

        * @return void
5. Code:

        */
6. Code:

       protected function setDocument() 
7. Code:

       {
8. Code:

           $document = JFactory::getDocument();
9. Code:

           $document->setTitle(JText::_('COM_SLOGIN'));
10. Code:

        }
11. Code:

    }