500 (Internal Server Error) on http.post in angular 2+

My service function:

public postDetails(Details): Observable<any> {
let cpHeaders = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: cpHeaders });
return this.http.post(this.baseUrl + "/api/adm/Dtls", Details,options)
.map((res: any) => {
let data = res.json();
return data; })
}


TS file.

let postdata:any= JSON.stringify(Details);

this.data = this.storageservice.postDetails(postdata);
this.data.subscribe((result: any) => {
if (result) {
console.log(result);
}
});


Error on Browser

OPTIONS http://10.23.233.45/statapi/api/details/Dtls 500 (Internal Server Error)
Failed to load http://10.23.233.45/statapi/api/details/Dtls: Response for preflight has invalid HTTP status code 500.
core.js:1448 ERROR Response {_body: ProgressEvent, status: 0, ok: false, statusText: "", headers: Headers, …}


I am able to post the data using Postman, but I am not able to send data through angular, I have no clue what's the issue.

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