Hey @imsumi8,
Thank you for reaching out to the Zoom Developer Forum. Looking at historical forum posts, it looks like this is related to an issue with the Web SDK Recaptcha feature. While we used to have a form to opt-out of this feature, as of version 1.8.0, the ReCaptcha is disabled by default. I recommend testing with an updated version of the SDK to see if that resolves your issue.
Let me know if you have any questions.
Thanks,
Max