critical error in my elementor :(

The link to the page to create a new header footer on my site does not open and gives a critical error message. Also, when I try to make changes to my existing header and footer page and publish it, the internal server gives error 500. WordPress software sent me an e-mail stating that there was a problem in the Elementor plugin on my site. I am providing the e-mail with error details as below. ?Thank you very much for your help.

e-Mail :

Hello!

The WordPress administration section has a feature that detects when a plugin or theme causes a serious problem on your site and notifies you with this automatic email.

In this case, WordPress found an issue with one of your plugins, Elementor.

First, go to your site (https://www.milyonkitap.com/) and see if there are any visible problems. Then, open the page with the error (https://www.milyonkitap.com/wp-admin/post-new.php?post_type=elementor-hf) and see if there are any visible problems.

Please contact your service provider to help you investigate this matter further.

If your site seems broken and you can't access the administration section normally, there is now a special WordPress "recovery mode". Using this, you can securely log in to your dashboard to conduct further research.

https://www.milyonkitap.com/wp-login.php?action=enter_recovery_mode&rm_token=o4CHgsINhnjf8ZKKIz1HCy&rm_key=VTfOeKIdp6QCwbHWlt0cm7

To keep your site safe, this link will expire in 1 day. Don't worry about this though. If the problem occurs again after it expires, a new link will be emailed to you.

When searching for help with this issue, you may be asked for some of the following information:

WordPress 6.6.1 version

Theme used: Hello Elementor (version 3.1.0)

Plugin used: Elementor (version 3.23.3)

PHP 8.1.29 version Error details /home/milyonkitap/public_html/wp-content/plugins/elementor/includes/template-library/sources/local.php dosyas?n?n 1112 sat?r?nda E_ERROR türünde bir hata olu?tu. Hata iletisi: Uncaught TypeError: Elementor\TemplateLibrary\Source_Local::on_save_post(): Argument #2 ($post) must be of type WP_Post, null given, called in /home/milyonkitap/public_html/wp-includes/class-wp-hook.php on line 326 and defined in /home/milyonkitap/public_html/wp-content/plugins/elementor/includes/template-library/sources/local.php:1112Stack trace:#0 /home/milyonkitap/public_html/wp-includes/class-wp-hook.php(326): Elementor\TemplateLibrary\Source_Local->on_save_post(0, NULL)#1 /home/milyonkitap/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)#2 /home/milyonkitap/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)#3 /home/milyonkitap/public_html/wp-includes/post.php(4891): do_action('save_post', 0, NULL, false)#4 /home/milyonkitap/public_html/wp-admin/includes/post.php(766): wp_insert_post(Array, false, false)#5 /home/milyonkitap/public_html/wp-admin/post-new.php(66): get_default_post_to_edit('elementor-hf', true)#6 {main}? thrown

The page I need help with: [log in to see the link]