Hi @drtimofey!
Przemek here,
Thanks for reaching out! We believe it is a problem with Yoast plugin because w don’t use JS in Revision Manager TMC,
About 3 months ago we have built a new website for the customer and he asked us to install Yoast plugin ( which is quite very popular ) and unfortunately, Yoast crashed some pages on wp backend. I belive now they solved the problem.
I think at the beginning I would try to make a copy of the post using a different tool like https://wordpress.org/plugins/duplicate-post/. I suspect that changing post status ( draft/pending ) can be wrong handled.
Try and please let us know what happened.
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Przemek
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This reply was modified 7 years, 1 month ago by
themastercut. Reason: typo
I found the bug!
Revisions.php line 264:
echo '<style>.editor-post-publish-panel__toggle { display: none !important; }</style>';
This line injects the <style> tags before the <!DOCTYPE html> tag. This causes the browser to not render the page as HTML5.
Here is another example where it causes errors. Create an account with Contributor role. Login as that account and click to make a Revision. You get this error:

This code needs to be injected into the <head>.
Let me know when you have this fixed.
Hello again, Jacob here.
Thanks for quick check, it really sped up the fix.
I hope wp_blocks hooks will be documented much better in the future.
New version (2.5.2) with fix is now live.
Stay tuned and have a nice day!
Jacob 🙂
I can confirm this fixed the conflict with Yoast SEO plugin and all other issues described herein.
Thanks 🙂
Hi @drtimofey!
Przemek here,
Thanks for the feedback. Forgive me, I assessed the problem with Yoast a bit too quickly. Thanks for perseverance and help ;). Today we will release a new plugin update. The update will add a new feature in Gutenberg revisions, so stay tuned and have a great day 😉
–
Przemek
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This reply was modified 7 years, 1 month ago by
themastercut. Reason: typo