Android to Django - always showing 401

I am trying to connect to my Django backend server from my app. While in local/dev with http connection the android app is getting connected to the server, it is rreturning HTT 401 error for all API calls via the app (except the login call). However, funny thing is using Postman, I'm being able to reach the prod server.

Following is one of the code snippets (android):

try{
            URL targetUrl = new URL(targetURL);
            httpConnection = (HttpURLConnection) targetUrl.openConnection();
            httpConnection.setRequestMethod("GET");
            httpConnection.setRequestProperty("Authorization", "jwt " + mToken);
            httpConnection.setConnectTimeout(10000); //10secs
            httpConnection.connect();

            Log.i(TAG, "response code:" + httpConnection.getResponseCode());
            if (httpConnection.getResponseCode() != 200){
                Log.e(TAG, "Failed : HTTP error code : " + httpConnection.getResponseCode());
                return Constants.Status.ERR_INVALID;
            }

            //Received Response
            InputStream is = httpConnection.getInputStream();
            BufferedReader rd = new BufferedReader(new InputStreamReader(is));

            String line;
            while((line = rd.readLine()) != null) {
                response.append(line);
                //response.append('\r');
            }
            rd.close();

            Log.i(TAG, response.toString());
            // Save the tenant details
            return parseTenantInfo(response.toString());

        }catch (MalformedURLException e) {
            e.printStackTrace();
            return Constants.Status.ERR_NETWORK;

        } catch (SocketTimeoutException e) {
            e.printStackTrace();
            return Constants.Status.ERR_NETWORK;
        }

        catch (IOException e) {
            e.printStackTrace();
            return Constants.Status.ERR_UNKNOWN;
        }finally {

            if(httpConnection != null) {
                httpConnection.disconnect();
            }
        }

Following is the target url:

private static final String targetURL = Constants.SERVER_ADDR + APIs.tenant_get;

Here, SERVER_ADDR is https://www.example.com/ and tenant_get is apitogettenantinfo/

I am always getting 401 error. Kindly help me out!!! Thanks.

EDIT:

Following is the screenshot of my postman. A few things are blacked out for security & privacy:

http://imageshack.com/a/img923/231/wUrOuS.png