Bugfix: GUI/Intro: Handle errors from SelectParams the same as if during InitConfig

Without this, invalid vbparams just silently exit with no message

src/qt/intro.cpp

@@ -18,7 +18,9 @@
 
 #include <common/args.h>
 #include <interfaces/node.h>
+#include <node/interface_ui.h>
 #include <util/fs_helpers.h>
+#include <util/translation.h>
 #include <validation.h>
 
 #include <QFileDialog>
@@ -26,6 +28,7 @@
 #include <QMessageBox>
 
 #include <cmath>
+#include <cstdlib>
 
 /* Check free space asynchronously to prevent hanging the UI thread.
 
@@ -221,8 +224,10 @@ bool Intro::showIfNeeded(bool& did_show_intro, int64_t& prune_MiB)
         /* Use selectParams here to guarantee Params() can be used by node interface */
         try {
             SelectParams(gArgs.GetChainType());
-        } catch (const std::exception&) {
-            return false;
+        } catch (const std::exception& e) {
+            InitError(Untranslated(e.what()));
+            QMessageBox::critical(nullptr, CLIENT_NAME, QObject::tr("Error: %1").arg(QString(e.what())));
+            std::exit(EXIT_FAILURE);
         }
 
         /* If current default data directory does not exist, let the user choose one */