This is likely to be a connectivity issue. Please follow the 3 steps below.
1. Reload the page in your web browser.
2. Ensure that you have a reliable internet connection. Wifi can occasionally cause some issues on smartphones, so if you are viewing your modules on you phone, please try to use 3/4G.
3. We recommend using Google Chrome where possible when completing your modules, as this is our default browser and works best.