What happened?

1.Go the infamous "sorry there was a problem" screen and it reported an issue that affects php 9.0.

Warning: Class Joomla\Session\Handler\DatabaseHandler implementing SessionHandlerInterface is missing the create_sid() method which will be required in PHP 9.0 in E:\Bearsampp-development\sandbox\www\joomla-cms\libraries\vendor\joomla\session\src\Handler\DatabaseHandler.php on line 25

Warning: Class Joomla\Session\Handler\DatabaseHandler implementing SessionHandlerInterface is missing the validateId() method which will be required in PHP 9.0 in E:\Bearsampp-development\sandbox\www\joomla-cms\libraries\vendor\joomla\session\src\Handler\DatabaseHandler.php on line 25

Warning: session_name(): Session name cannot be changed after headers have already been sent (sent from E:\Bearsampp-development\sandbox\www\joomla-cms\libraries\vendor\joomla\session\src\Handler\DatabaseHandler.php on line 25) in E:\Bearsampp-development\sandbox\www\joomla-cms\libraries\vendor\joomla\session\src\Storage\NativeStorage.php on line 385

Deprecated: Function spl_object_hash() is deprecated since 8.6, consider using spl_object_id() instead in E:\Bearsampp-development\sandbox\www\joomla-cms\libraries\src\Plugin\PluginHelper.php on line 178```


### Version

6.2

### Expected result

admin loads properly

### Actual result

<img width="1729" height="825" alt="Image" src="https://github.com/user-attachments/assets/9979ed84-2bb6-4408-a7df-ec5ca670c243" />

### System Information

Joomla 6.2 dev

### Additional Comments

_No response_