Try downloading WordPress again, access your server via SFTP or FTP, or a file manager in your hosting account’s control panel, and delete then replace your copies of everything on the server except the wp-config.php file and the /wp-content/ directory with fresh copies from the download. This will effectively replace all of your core files without damaging your content and settings.
Some uploaders tend to be unreliable when overwriting files, so don’t forget to delete the original files before replacing them.
If that makes no difference, Try adding define('CONCATENATE_SCRIPTS', false); to your wp-config.php file just below the define('DB_HOST' line.
To do so, access your server via SFTP or FTP, or a file manager in your hosting account’s control panel, and edit the file with a plain text editor.
https://codex.wordpress.org/Editing_wp-config.php#Disable_Javascript_Concatenation
Thread Starter
Vale
(@valericcione)
No, the problems are the same… i can click on save but at the end the site doesn’t change.
Dawngrade to WP 4.6 is a good idea?
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This reply was modified 9 years, 3 months ago by
Vale.
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This reply was modified 9 years, 3 months ago by Vale.
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This reply was modified 9 years, 3 months ago by Vale.
Unless you have a backup that you can restore from, downgrading is a dangerous process, which is why backing up before upgrading is strongly recommended both in the upgrade instructions and automatic upgrade interface.
It would be better to solve your current problem.
Try deactivating all plugins. If that resolves the issue, reactivate each one individually until you find the cause.
If that does not resolve the issue, try switching to the Twenty Sixteen theme to rule-out a theme-specific issue (theme functions can interfere like plugins).
Thread Starter
Vale
(@valericcione)
I resolved after deleted some file of w3 cache in root altough erased plugin before…
