Try doing the following:
1. Make sure that your computer is connected to the internet.
2. Make sure that your browser and operating system are supported. Napp® works on all HTML5-compatible browsers, and it supports the operating systems Microsoft Windows, Apple OS X and Linux.
3. Restart your browser and computer.
If none of the methods above work, feel free to contact us at email@example.com or tell us about the problem directly in our live chat. You access the chat by clicking the blue chat icon in the lower right corner of the page on our website or in the Napp® CMS.