Hello.

After a year or so with a buggy install, I have just taken the plunge and made a clean, up to date one, from scratch. The installation itself went fine.

However, the first thing I went to change in my options was the date format, under the general tab.

On clicking 'apply' I get this error:

`
Not Acceptable

An appropriate representation of the requested resource /zenphoto/zp-core/admin-options.php could not be found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
`
As far as I can see, this is the only problem with my install, but I would like to fix it as I invest a lot of time in my image archive.

Thanks for any help!

SOLVED.

Admin, this information may be of use to you:

After looking around, I suspected this was caused by triggering a kind of server security module called mod_security.

Apparently, you shouldn't turn this off, but I asked my server admin to turn it off for troubleshooting:

It is not possible to disable mod security rules for complete account but I have excluded it for the file "/zenphoto/zp-core/admin-options.php"

So now it works, and i'm happy about that, but is there something you guys should change to stop mod_security being triggered in future?

You might ask why Zenphoto has triggered this error. Certainly nothing Zenphoto is doing should be considered a security risk.

Sometimes "bad" file permissions cause this kind of reaction. If so then simply fixing the permissions is all that is needed.

It is probably just a quirky definition, set by my server admin. I have just noticed the same issue when saving changes to the theme files through the web editor.

I will ask them for more details on why exactly this is being blocked.

For others reference, I am on a shared Linux server, on eukhost.