C2491 Error using QT_INIT_METAOBJECT

[Saee1101]

I have problem with SmtpClient for Qt in windows :

QT_INIT_METAOBJECT const QMetaObject SmtpClient::staticMetaObject = { {
    QMetaObject::SuperData::link<QObject::staticMetaObject>(),
    qt_meta_stringdata_SmtpClient.data,
    qt_meta_data_SmtpClient,
    qt_static_metacall,
    nullptr,
    nullptr
} };

I don't know what to do ?
help me , please.

[Christian Ehrlicher]

Dupe of https://forum.qt.io/topic/154289/c2491-smtpclient-staticmetaobject-definition-of-dllimport-static-data-member-not-allowed/