--- a/QTfrontend/ui/widget/mapContainer.cpp	Thu Apr 25 21:32:22 2019 +0300
+++ b/QTfrontend/ui/widget/mapContainer.cpp	Thu Apr 25 21:24:27 2019 +0200
@@ -1255,6 +1255,7 @@
         errorMsg.setIcon(QMessageBox::Warning);
         errorMsg.setWindowTitle(QMessageBox::tr("File error"));
         errorMsg.setText(QMessageBox::tr("Cannot open '%1' for reading").arg(fileName));
+        errorMsg.setTextFormat(Qt::PlainText);
         errorMsg.setWindowModality(Qt::WindowModal);
         errorMsg.exec();
     }