[Вопрос] Помогите решить проблему

[Decade]

Warning: fopen(/var/www/user/data/www/golos.youtalks.ru/engine/cache/system/cron.php): failed to open stream: Permission denied in /var/www/user/data/www/golos.youtalks.ru/engine/modules/functions.php on line 279 Warning: fwrite(): supplied argument is not a valid stream resource in /var/www/user/data/www/golos.youtalks.ru/engine/modules/functions.php on line 280 Warning: fclose(): supplied argument is not a valid stream resource in /var/www/user/data/www/golos.youtalks.ru/engine/modules/functions.php on line 281 MySQL Error! 
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The Error returned was: 
Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause 

Error Number: 
1140 

SELECT url,count(*) FROM dle_clan_list WHERE clan_lider=1591

Помогите!!! Очень нужно решить проблему!