If you are using iPad please read here.
Please find below 2 simple steps that you can take to resolve this issue:
1. Use a desktop with Google Chrome as your browser.
2. Clear your cache (you can find the steps for the device you are using here).
If you are still experiencing technical difficulties please contact us here and send us a screenshot of any error message you may be getting (You can use this guide for taking screenshots on any device).
Please ensure that your screenshot includes:
- The browser
- The name of test and practice drill with which you are experiencing the error.
This information will allow us to better assist you.