The main thing that can cause this is a failure to play the voice-over audio.
To confirm this please:
- Start the software
- Select "Theory Test"
- Select "Settings, Sound" and set all options to Off/None then save settings
- Try the "Learn by practicing" or "Mock Test" option again.
If the issue persists, please collect a diagnostic report using this utility. The utility will display a form for you to complete with details of the symptom and then save the diagnostic report.
Please attach the .DIAG file (which is a renamed .ZIP file, if you want to look inside and check the information being sent to us) to a new support ticket.