Response to preflight request doesn't pass access control check: It does not have HTTP ok status

Hello Everybody;
we are trying to use API login function in Vue but we got this error:

    Access to fetch at 'http://ip/api/method/login' from origin 
    'http://ip' has been blocked by CORS policy: Response to preflight request 
     doesn't pass access control check: It does not have HTTP ok status. 

we have updated nginx.conf as mentioned here
but still get this error
what’s going wrong with us?

Hi ,
I’m getting the same error. Have you managed to solve this ?
Thanks,