CORS Error Resolution for Mixpanel in React Projects

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Hi, I am using "mixpanel-browser": "^2.47.0" in a React project, it working beautifully, but currently I am getting CORS error in all of my environments. Any reason why it could be happening?

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Abhishek C.
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Access to XMLHttpRequest at 'https://events.launchdarkly.com/events/bulk/6151756dd01a4925f14501ab' from origin 'https://app.eximpe.com' has been blocked by CORS policy: Request header field x-openreplay-sessiontoken is not allowed by Access-Control-Allow-Headers in preflight response.

Abhishek C.
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Access to XMLHttpRequest at 'https://events.launchdarkly.com/events/bulk/6151756dd01a4925f14501ab' from origin 'https://app.eximpe.com' has been blocked by CORS policy: Request header field x-openreplay-sessiontoken is not allowed by Access-Control-Allow-Headers in preflight response.