failed: Permission denied opendir(/var/lib/php5)

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1

Will somehow solve this problem symphony? Ple our technical support there would not interfere at all Mautic

Code:
[2016-02-01 17:55:05] mautic.NOTICE: PHP Notice: SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php5) failed: Permission denied (13) - in file xxx/app/cache/prod/classes.php - at line 423 [] []
2

Will somehow solve this problem symphony? Ple our technical support there would not interfere at all Mautic

[2016-02-01 17:55:05] mautic.NOTICE: PHP Notice: SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php5) failed: Permission denied (13) - in file xxx/app/cache/prod/classes.php - at line 423 [] []
3

Same problem here, what permissions are need for which directory according to this error message in the log?