Recieving "Fail to join the meeting" (error code: 200) when using registrant token

Hello, I’m unable to join a meeting via the SDK when it requires registration. However, using the same code ( Zoom Meeting SDK React sample) I’m successfully able to join instant meetings.

I’m also able to use the join_url from the /meetings/{meetingId}/registrants endpoint to join via the browser. So I’m assuming this is not a problem with the tk value or approval status.