Vframe 2.4.0 Db Exception thrown, code: #0

Connection failed: "SQLSTATE[HY000] [2002] No such file or directory"

An exception has been throwed in file: /var/www/dev.www.nowiny.pl/public_html/System/Vframe2/Vframe/Db.Class.php at line 87

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Vframe 2.4.0,