Same errors in the page code( Blank pages in admin panel.

I’m using a plugin for changing default login url, so it is working. But all other pages in admin panel (uder the role Editor or Author) are blank and the code contains an error:
<!–
Error: <strong class=”td-wp-booster-title”>wp_booster error:<br>td_api_base::mark_used_on_page : a component with the ID: td_theme_plugins_setup is not set.<br>/home/6886786.cloudwaysapps.com/fghfhgfhfg/public_html/wp-content/themes/Newspaper/includes/wp_booster/td_api.php (rara-error)
–>

<!–
Error: <strong class=”td-wp-booster-title”>wp_booster error:<br>Missing parameter: ‘file'<br>/home/6886786.cloudwaysapps.com/fghfhgfhfg/public_html/wp-content/themes/Newspaper/includes/wp_booster/td_autoload_classes.php (rara-error)
–>

<!–
Error: <strong class=”td-wp-booster-title”>wp_booster error:<br>Missing parameter: ‘file'<br>/home/6886786.cloudwaysapps.com/fghfhgfhfg/public_html/wp-content/themes/Newspaper/includes/wp_booster/td_autoload_classes.php (rara-error)
–>

I’ve seen all those links before. All I was asking for is a list of changed files from version 9.6.1 to version 9.7 (not the one from 9.7 to 9.7.1). Where I can find it?
Because I’m sure, that besides moving the files, there are some changes in the code of the files used by my child theme. Can I see the changelog, please?

I just tried to make a test page in Tagdiv Composer with several different blocks. The first load of the page is very slow – about 4-5 seconds. Then, as I understand it, my caching plugin catches it, and the second and all further loads are pretty fast for some time.
But if any changes of the site content happens (like new post was published), the page first load (after changes) became slow again, and I’m seeing a spike of this weird “Transactinos /page” in Newrelic. Our site is updating very often – so it gonna be a problem if we will use a page made in Composer as an index page.

This began after 9.5 updates. All caches were cleaned many times already. I don’t know what to do.

Right now I have only two pages, made in Composer, they are almost hidden — no one clicks on them. And also both of them are fully cached on Cloudflare (with “HTML cahe” and status “cache everything”).
So it is something else, that triggers Transaction /page, but I can’t understand, what can it be.
Have you any ideas, what can trigger Transaction /page, and why does it take 4-6 seconds?
Thanks.

This div (where buttons should be) is empty:

Updated evrything once again with ftp. Same result – blank pages.

1. I’ve updated theme through Envato plugin. So after that I still need to update plugins through FTP?
2. I can’t find anything about child theme changes in the chanelog (https://tagdiv.com/newspaper/). Where can I find info on how to “re-apply changes” to child theme?

Replace files of Newspaper 9.5 with files of 9.2.2 and also replace files of previous version of TagDiv composer from backup. 9.5 is a disaster, destroyed my site too(

I’m speaking about this problem: https://themeforest.net/item/newspaper/5489609/comments?page=666&filter=all#comment_18588378

Here is a screenshot of a search engine results page:

I’ve found some kind of solution here: https://themeforest.net/item/newsmag-news-magazine-newspaper/9512331/comments?page=191&filter=all#comment_19710460

But it means, that after tagdiv composer update, I will need to edit the file manualy again. Is there any other way to do it?

Thank you for your answer. Looks like publishing works a little bit better, when the hook “add_action( ‘save_post’, array( $this, ‘on_save_post’ ) ); ” in includes/wp_booster/wp-admin/tinymce td_wp_editor.php is commented.
Could you clearify please, what does it do and is it safe to “turn it off”? Thank you.

By the way: saving of unpublished post is much faster. It is weird.

Thank you for your answer. As I wrote above, I’m using “Big Grid Full” element.
1. First, I’ve set “Big Grid Full” element. Everything was fine.
2. Then I’ve changed it to “Big Grid” element (just to try it)
3. Then I’ve set a general background color of all pages in the “Theme colors” section. And I think, that was the moment, when fixed width – 1164px – appeared.
4. And then tried to set “Big Grid Full” instead of “Big Grid” element. And it didn’t work: I was able to place “Big Grid Full”, but it still was narrow – 1164px.

Thank you, it works)