سلام من ibsng رو نصب کردم start هم شد ولی‌ تو گسمت /ibsng/admin این ارور رو میده

Warning: localtime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EDT/-4.0/DST' instead in /usr/local/IBSng/interface/IBSng/inc/error.php on line 25


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