Try another server if current is down when creating new seed

src/firsttimewizard.cpp

@@ -293,10 +293,26 @@ void NewSeedPage::initializePage() {
     // Call the library to create a new wallet.
     qDebug() << __func__;
 
-    char* resp = litelib_initialize_new(parent->dangerous,parent->server.toStdString().c_str());
-    QString reply = litelib_process_response(resp);
+    QString reply = "";
+    try {
+        char* resp = litelib_initialize_new(parent->dangerous,parent->server.toStdString().c_str());
+        reply = litelib_process_response(resp);
+    } catch (const std::exception& e)  {
+        qDebug() << __func__ << ": caught an exception, ignoring: " << e.what();
+    }
+
     qDebug() << __func__ << ": reply=" << reply;
 
+    if (reply.toUpper().trimmed() != "OK") {
+            qDebug() << "Lite server " << parent->server << " is down, getting a random one";
+            parent->server = Settings::getRandomServer();
+            qDebug() << __func__ << ": new server is " << parent->server;
+
+            // retry with the new server
+            char* resp = litelib_initialize_new(parent->dangerous,parent->server.toStdString().c_str());
+            reply = litelib_process_response(resp);
+    }
+
     auto parsed = json::parse(reply.toStdString().c_str(), nullptr, false);
     if (parsed.is_discarded() || parsed.is_null() || parsed.find("seed") == parsed.end()) {
         form.txtSeed->setPlainText(tr("Error creating a wallet") + "\n" + reply);