When verifying your voice, please ensure that your browser can use your microphone and that you are not muted. Also, ensure that the recorded audio from your computer microphone is similar to the audio uploaded for cloning and that the recording is of good quality, without any background noise such as a dog barking or a fan running loudly in the background or reverb.
If your verification failed or you couldn't verify your voice for some other reason, please reach out to support and they can look into it and reset your attempts. You can open a ticket here.