Print Preview is not working

[jhypsss]

when i try to click a print button in php. the print preview wont show up

[jhypsss]

Here's the Debug Log

• 19:03:13.859 DEBUG: ClientHandler::OnAfterCreated()
• 19:03:13.859 DEBUG: GetBrowserWindow(): not found, hwnd = 131244
• 19:03:13.859 DEBUG: BrowserWindow::BrowserWindow() created for Popup
• 19:03:13.859 DEBUG: StoreBrowserWindow(): hwnd = 131244
• 19:03:13.859 DEBUG: Centering popup window relative to its parent

[gramz1]

i have same issue