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Database Exceptionyii\db\Exception

SQLSTATE[HY000]: General error: 1927 Authentication with backend failed. Session will be closed. (server1)

Error Info: Array
(
    [0] => HY000
    [1] => 1927
    [2] => Authentication with backend failed. Session will be closed. (server1)
)
$_GET = [
    'from' => 'Яранск',
    'to' => 'Казань',
    'date' => '21.09.2021',
];

$_SESSION = [
    '__flash' => [],
    'region' => [
        'ip' => '3.227.0.245',
        'country' => 'США',
        'country_code' => 'US',
        'region' => 'Виргиния',
        'region_code' => 'VA',
        'city' => 'Ашберн',
    ],
];