I kindly ask for help with a bizarre situation. PS 1.7.6.7
When I edit a CMS Page and place an image ou change any peace of text content, when saving it goes to 404 page not found.
I've reset the .htaccess file, disabled friendly urls, enable them, and the problem is always the same. In product pages there is no problem at all.
I downgrade to php 7.2 (it was 7.3) and the problem stays the same. For information I have 3 languages. EN, FR and PT.
Any help about this?
Thanks in advance!