<!-- Describe the issue -->
Hello evryone, I get nothing when I click in open wallet, I am new to bitcoin and expect to show something.

![BitcoinIssue](https://user-images.githubusercontent.com/39341595/57179721-5024fc00-6e9e-11e9-80dd-af5e4345be48.png)

I'am using Bitcoin Core (both in testnet and mainnet, didn't work) 0.18 on window 10. 

connect(sendCoinsAction, &QAction::triggered, [this]{ showNormalIfMinimized(); });
    connect(sendCoinsAction, &QAction::triggered, [this]{ gotoSendCoinsPage(); });
    connect(sendCoinsMenuAction, &QAction::triggered, [this]{ showNormalIfMinimized(); });
    connect(sendCoinsMenuAction, &QAction::triggered, [this]{ gotoSendCoinsPage(); });
    connect(receiveCoinsAction, &QAction::triggered, [this]{ showNormalIfMinimized(); });
    connect(receiveCoinsAction, &QAction::triggered, this, &BitcoinGUI::gotoReceiveCoinsPage);
    connect(receiveCoinsMenuAction, &QAction::triggered, [this]{ showNormalIfMinimized(); });
    connect(receiveCoinsMenuAction, &QAction::triggered, this, &BitcoinGUI::gotoReceiveCoinsPage);
    connect(historyAction, &QAction::triggered, [this]{ showNormalIfMinimized(); });
    connect(historyAction, &QAction::triggered, this, &BitcoinGUI::gotoHistoryPage);
#endif 
    quitAction = new QAction(platformStyle->TextColorIcon(":/icons/quit"), tr("E&xit"), this);
    quitAction->setStatusTip(tr("Quit application"));
    quitAction->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q));
    quitAction->setMenuRole(QAction::QuitRole);
    aboutAction = new QAction(platformStyle->TextColorIcon(":/icons/about"), tr("&About %1").arg(tr(PACKAGE_NAME)), this);
    aboutAction->setStatusTip(tr("Show information about %1").arg(tr(PACKAGE_NAME)));
    aboutAction->setMenuRole(QAction::AboutRole);
    aboutAction->setEnabled(false);
    aboutQtAction = new QAction(platformStyle->TextColorIcon(":/icons/about_qt"), tr("About &Qt"), this);
    aboutQtAction->setStatusTip(tr("Show information about Qt"));
    aboutQtAction->setMenuRole(QAction::AboutQtRole);
    optionsAction = new QAction(platformStyle->TextColorIcon(":/icons/options"), tr("&Options..."), this);
    optionsAction->setStatusTip(tr("Modify configuration options for %1").arg(tr(PACKAGE_NAME)));
    optionsAction->setMenuRole(QAction::PreferencesRole);
    optionsAction->setEnabled(false);
    toggleHideAction = new QAction(platformStyle->TextColorIcon(":/icons/about"), tr("&Show / Hide"), this);
    toggleHideAction->setStatusTip(tr("Show or hide the main Window"));
    encryptWalletAction = new QAction(platformStyle->TextColorIcon(":/icons/lock_closed"), tr("&Encrypt Wallet..."), this);
    encryptWalletAction->setStatusTip(tr("Encrypt the private keys that belong to your wallet"));