Joomla error validation rule missing url

[melsauto]

Hello everyone i need some help with my website autorepairfl.com.

When i add content to an article or create a new article and try to save i get error message.

"validation rule missing url "

Thanks

[jcms]

set error_reporting to maximum in configuration.php file and check more error

[melsauto]

set error_reporting to maximum in configuration.php file and check more error

[Tue Feb 17 12:00:10 2015] [error] [client 107.146.20.43] File does not exist: /home/anjan/public_html/404.shtml
[Tue Feb 17 12:00:10 2015] [error] [client 107.146.20.43] File does not exist: /home/anjan/public_html/favicon.ico
[Tue Feb 17 12:00:10 2015] [error] [client 107.146.20.43] File does not exist: /home/anjan/public_html/404.shtml
[Tue Feb 17 12:00:10 2015] [error] [client 107.146.20.43] File does not exist: /home/anjan/public_html/favicon.ico
[Tue Feb 17 11:59:08 2015] [error] [client 107.146.20.43] File does not exist: /home/anjan/public_html/404.shtml, referer: http://www.autorepairfl.com/administrat ... dit&id=115
[Tue Feb 17 11:59:08 2015] [error] [client 107.146.20.43] File does not exist: /home/anjan/public_html/templates/tpl_project25, referer: http://www.autorepairfl.com/administrat ... dit&id=115
[Tue Feb 17 11:29:52 2015] [error] [client 199.58.86.211] File does not exist: /home/anjan/public_html/404.shtml
[Tue Feb 17 11:29:52 2015] [error] [client 199.58.86.211] File does not exist: /home/anjan/public_html/robots.txt

Thanks for your help.

[jcms]

use firebug and check conflict javascript?