Thanks d4z_c0nf the problem was what you told me .
I made a full erase of W3Total Cache plugin .
– Delete the plugin directory in wp -content / plugins
– In the folder wp -content deleted files : advanced – cache.php , db.php , full – wp- cache- config.php and folder w3tc whole .
– Revised the .htaccess file and delete the lines concerning W3Total
After this operation.
Thanks again to all .