PDOException code: 2002 about frommysqltopostgresql HOT 3 CLOSED

{
    "source_description" : [
        "Connection string to your MySql database",
        "Please ensure, that you have defined your connection string properly.",
        "Ensure, that details like 'charset=UTF8' are included in your connection string (if necessary)."
    ],
    "source" : "mysql:host=localhost;port=3306;charset=UTF8;dbname=main,dev,dev",

    "target_description" : [
        "Connection string to your PostgreSql database",
        "Please ensure, that you have defined your connection string properly.",
        "Ensure, that details like options='[double dash]client_encoding=UTF8' are included in your connection string (if necessary)."
    ],
    "target" : "pgsql:host=localhost;port=5432;dbname=main;options=--client_encoding=UTF8,dev,dev",

    "encoding_description" : [
        "PHP encoding type.",
        "If not supplied, then UTF-8 will be used as a default."
    ],
    "encoding" : "UTF-8",

    "schema_description" : [
        "schema - a name of the schema, that will contain all migrated tables.",
        "If not supplied, then a new schema will be created automatically."
    ],
    "schema" : "",

    "data_chunk_size_description" : [
        "During migration each table's data will be split into chunks of data_chunk_size (in MB).",
        "If not supplied, then 10 MB will be used as a default."
    ],
    "data_chunk_size" : 10
}