Thank you, but the problem was solved by my server support. They tried some things and the last runs.
Hello,
I find that I get my 403 error exclussively if the post or page has in its tittle field quicktags of mqtranslate plugin.
I tried to deactivate the plugin but it not runs.
I think that there is a conflict with login.php when reads the tittle fields and find quicktags, but I don’t undestrand why it work whith quicktags till two days ago…
Do you have any idea?
Thanks