Access denied for user 'dev'@'localhost' (using password: YES)

Debug information:
Event: 2f4aa492df25b2499af2aed2a655d371.txt
#0 /home/dev/public_html/xchart/Drivers/MySQL.Driver.php(32): mysqli->__construct('localhost', 'dev', Object(SensitiveParameterValue), 'dev_xchart') #1 /home/dev/public_html/xchart/Core/stdApp.php(89): DbDriver\MySQL->connect(Object(SensitiveParameterValue), Object(SensitiveParameterValue), Object(SensitiveParameterValue), Object(SensitiveParameterValue)) #2 /home/dev/public_html/xchart/Core/stdApp.php(41): stdApp\App->buildInstances() #3 [internal function]: stdApp\App->__construct('Management', 'Management/') #4 /home/dev/public_html/xchart/index.php(97): ReflectionClass->newInstanceArgs(Array) #5 {main}