I installed Jom Classifieds on my website, but when I tried to make some basic changes at the "General configuration" tab I got this message:

Not Acceptable
An appropriate representation of the requested resource /administrator/index.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.

I tried with many different browsers, and different computers, just to be sure. Everything else on the website is working with no problem.

Can you please help me out?
Thank you.

Actually it a hosting issue, Kindly check our below forum thread for this issue.

jomclassifieds.com/forum/site-configurat...hen-saving.html#2129

Thanks.