The funny (strange) thing is that in local installation (USBWebserver) it runs perfect and save the settings.
Hey Nikos,
Thanks for reaching out to us here, I’m really sorry about your issues and hopefully we can help out.
The text from you that I quoted above indicates that there is, indeed, something specific to your non-local installation that seems to be the culprit here (i.e. your site that is not running on USBWebserver).
You mention running through our troubleshooting steps, which we appreciate and is a big help. I’m curious, have you activated WP_DEBUG on your site? If not, you can do that by heading to your site’s wp-config.php file and change this line of code:
define('WP_DEBUG', false);
to this:
define('WP_DEBUG', true);
That will display PHP errors if any exist, which might help here.
After activating that, try to save settings again. See what happens – if any errors pop up, copy and paste them in their entirety to a Gist at http://gist.github.com, and share a link back to those Gists in your reply.
Let us know what you find!
Thank you,
George