When a page is modified, almost all content is deleted.

Hi Rikard, unfortunately the same problem happens to me for any change to the page.
even if I change only the page layout or move a column.
in a few days I try to put the site online, if in the dedicated section I am attaching the login credentials the programmers can see the structure?
This is the first time a problem like this happens to me

Hi Rickard, I finally posted the same website remotely that gave me the problem when I updated the contents of a page.
The problem was that with the advanced editor, as soon as I updated most of the newly created contents disappeared.
I did a new WordPress installation and updated theme locally and so the problem seemed to be solved.
Today with the remote site I had the same problem creating an article.
I managed to do an article in Italian but to do the articles in Spanish and English the problem started.
I disabled all the plugins and tried to create the articles like this but without succeeding.
I tried the same actions from the copy of the site I have as a test.
This copy has no plugin but even so the problem presents itself the same way.
I confirm that this is a bug in the enfold theme.
I can create a copy of the site online, with a duplicator pro, as it appears now.
I really need help solving the problem because I can’t find a solution.
From this backup today you can test the editor’s bug.
At this moment I cannot risk having other problems on the online site.
I write the link to the site and the link to today’s latest article. From this article the problem already started on the site under development has begun.
Thank you so much

Hi Rikard, I try to do some checks by increasing the memory limit on the server side. If this doesn’t work, I’ll send you accesses.

Hi Rikard. I want to apologize to the team.
I solved the problem that was caused by 2 incompatibilities in this way.
I modified the file wp-config.php: define( ‘WP_MEMORY_LIMIT’, ‘768M’ );
I have disabled and removed the plugin SG Optimizer.
Now I can change the page layout without any errors.
I believe that when you have to create a new page with a heavy layout the plugins to manage the cache together with a low memory limit can create conflicts.
thanks to all of you from Kriesi

Hi Rikard with these actions the problem has been solved.
Yes I believe we can close this thread

All useless Rikard.
The wrong html code cannot be deleted. The code column cannot be deleted either.
I declare ko.
tomorrow I review the whole project locally and check all the merkups.
Only solution to uninstall and restart from the beginning.
Best regards

Hai Ismael, as Rikard showed me the error was caused by a markup that I wrote incorrectly.
My mistake was this: Premi il tasto PLAY </play>
This error has corrupted the html code that I could no longer modify.
I deleted the page.
I deleted the child theme and theme.
I installed the enfold theme again.
Now Avia no longer has the problem.
Thank you very much to you and Rikard.
Best regards.

hi Jordan, thank you, the topic can be considered closed.
Best regards.