Try Deiteris W-Okada Kaggle instead of original "mainline" W-Okada Colab. https://www.kaggle.com/code/suneku/voice-changer-public https://docs.aihub.gg/realtime-voice-changer/cloud/deiteris-w-okada-fork-kaggle/
While there's Deiteris W-Okada for Colab, the website somehow requires you to pay for Colab Pro to use the notebook; otherwise your Colab account could either be terminated from using the service. https://docs.aihub.gg/realtime-voice-changer/cloud/deiteris-w-okada-fork-colab/