@otacke I confirm the last version has solved this issue. I did not read the server logs. Thanks for solving that bug.
Hi, So far, I have tried many things, including disabling all the plugins, changing the PHP memory limit, execution time, and theme. I will request access to the PHP server logs to look for further clues.
I am familiar to PHP. If I get the hours from my project to work on it, and let you know.
Thanks.