QByteArray::append(const QString &str) a is deprecated

The Unicode data was converted into 8-bit characters using
QString::toUtf8(), now it must be explicit.

src/Cloud/CloudDBChart.cpp

@@ -416,7 +416,7 @@ CloudDBChartClient::unmarshallAPIv1Object(QJsonObject* object, ChartAPIv1* chart
     chart->ChartDef = object->value("chartDef").toString();
     QString imageString = object->value("image").toString();
     QByteArray ba;
-    ba.append(imageString);
+    ba.append(imageString.toUtf8());
     chart->Image = QByteArray::fromBase64(ba);
     chart->CreatorNick = object->value("creatorNick").toString();
     chart->CreatorEmail = object->value("creatorEmail").toString();