Response for preflight has invalid HTTP status code 404?

[QzhouZ]

reqwest(
    {
        url: 'http://firmware.duoxieyun.com/sw/android/cold-chain-platform',
        type: 'json',
        method: 'get'
    }
)

ERROR: Response for preflight has invalid HTTP status code 404?

But I use

$.ajax({
        url: 'http://firmware.duoxieyun.com/sw/android/cold-chain-platform',
    type: 'json',
    method: 'get'
});

It worked well, what is the wrong?

[CaitlinWeb]

I am also having the same issue. The API is working as expected but reqwest thinks it is redirecting. The error I'm getting in console is

Response for preflight is invalid (redirect)

I've tried

headers: {
  "Content-Type": "application/x-www-form-urlencoded"
}

and changing other configuration values and nothing seems to help.