Read aloud exercises are available on updated versions of Chrome, Safari and Firefox. For iPads, your iOS version needs to be at least 14.5.
If you are using a headset, please check that it has been plugged into your computer or tablet properly. Then try to refresh the page.
If the issue is still there, you can go to the Sound Settings on your device and check in the Input or Recording Audio Device if there is a microphone and that the input level is not set to 0 or muted.
If after those checks you still have the issue, you can deactivate the read aloud exercises for this device, or from the student's profile if you are a teacher.
Deactivating the microphone from your device
When you are on Lalilo, select the little lock symbol to the left of the URL. You will see "Microphone" and a menu with "Authorize"; select this menu and then select Block.
Deactivating the microphone for a student profile
From the teacher account, you will need to go to Students on the left menu, and then toggle off the microphone next to the student's name.
If you need further information, feel free to submit a Support ticket.