Vframe 2.3.4 Db Exception thrown, code: #0

Connection failed: "SQLSTATE[HY000] [2002] Connection refused"

An exception has been throwed in file: /home/przelom/domains/beta.przelom.pl/przelom-portal-v3/System/Vframe2/Vframe/Db.Class.php at line 87

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Vframe 2.3.4,