QTextStream::setCodec() is gone in Qt 6.0, so use the replacement setEncoding() function

app/backend/nvhttp.cpp

@@ -414,7 +414,13 @@ NvHTTP::openConnectionToString(QUrl baseUrl,
     QString ret;
 
     QTextStream stream(reply);
+
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    stream.setEncoding(QStringConverter::Utf8);
+#else
     stream.setCodec("UTF-8");
+#endif
+
     ret = stream.readAll();
     delete reply;