diff -r 57ed3981db20 -r b9437746bffb QTfrontend/ui/widget/gamecfgwidget.cpp
--- a/QTfrontend/ui/widget/gamecfgwidget.cpp	Thu Apr 25 21:32:22 2019 +0300
+++ b/QTfrontend/ui/widget/gamecfgwidget.cpp	Thu Apr 25 21:24:27 2019 +0200
@@ -403,6 +403,7 @@
         illegalMsg.setIcon(QMessageBox::Warning);
         illegalMsg.setWindowTitle(QMessageBox::tr("Error"));
         illegalMsg.setText(QMessageBox::tr("Cannot use the weapon scheme '%1'!").arg(name));
+        illegalMsg.setTextFormat(Qt::PlainText);
         illegalMsg.setWindowModality(Qt::WindowModal);
         illegalMsg.exec();
     }