browser access interface 200, remote call 500 error, how to solve? -sharp-sharp-sharp problem description

the environmental background of the problems and what methods you have tried

I added

 add_header Access-Control-Allow-Origin *;
 add_header Access-Control-Allow-Headers X-Requested-With;
 add_header Access-Control-Allow-Methods GET,POST,OPTIONS;
 add_header Access-Control-Allow-Origin *;
    add_header Access-Control-Allow-Methods "GET, POST, OPTIONS";
    add_header Access-Control-Allow-Headers "DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization";

     if ($request_method = "OPTIONS") {
        return 204;
      }

 

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?