After updating the component, the pages of my site are not rendered properly. I purged the cache and url but nothing changes. To operate the site have to disable the component. Unfortunately I did not make a backup copy before this update.

I realized after the upgrade that configuration.php is not writable. May have affected?

the website is www.madeincongress.it
see the attachments to see before-after

Please help me :-(

Joomla 2.8
Apache 2.2.23
PHP 5.2.17
MySQL 5.5.23-55

I attach a screenshot where there are 2 versions of JoomSEF ... Is this normal?

Hi,

Having two different versions displayed is strange. Anyway, according to your screenshot with JoomSEF enabled it seems that there's some PHP error encountered. Please check your server's errors log file or enable error reporting and post the error message. Thank you.

This is Joomla error log. I hope it will be useful. Now I have to enable the error log on the website because they were not.

Thank you, it seems there's a problem with our Zoo extension not working correctly with current version of JoomSEF.
We'll fix it as soon as possible and let you know.

I do not want to give you fast. The problem is that my site is not working and 404 increase. Can you tell me an easy way to downgrade to version 4.2.9 without losing the configuration and redirects?