Can't access to Administrator Backendpanel - Joomla! Forum - community, help and support

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hi together,

i've problem can't access admin backend in joomla 3.3.6.
when try login got following error message.


code: select all

jos-error: unknown column '' in 'order clause' sql=select * `jom_postinstall_messages` `extension_id` = '700' , `enabled` = '1' order `` asc

plgsystemkoowa -> exceptionhandler()
jerror :: raiseerror() @ /var/www/plugins/system/koowa/koowa.php:147
jerror :: raise() @ /var/www/libraries/legacy/error/error.php:253
jerror :: throwerror() @ /var/www/libraries/legacy/error/error.php:179
call_user_func_array() @ /var/www/libraries/legacy/error/error.php:217
jerror :: handlecallback()
call_user_func() @ /var/www/libraries/legacy/error/error.php:754
plgsystemkoowa -> errorhandler()
jerror :: raiseerror() @ /var/www/plugins/system/koowa/koowa.php:166
jerror :: raise() @ /var/www/libraries/legacy/error/error.php:253


thanks help.
regards






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