when I use dropboxAPI to delete file, I get 500 error. why?

I'll be happy to help with any issues you're having with the Dropbox API, but I'll need some more information. Please reply with:

• the steps to reproduce the issue, including relevant code snippet(s), but don't include any access or refresh token(s)
• the full text of any error or unexpected output
• 5-10 sample 'X-Dropbox-Request-Id' response header values for the failures

Thank you for your reply; when I run my app as user privilege ,All works well. but run as system privilege , I receive statusCode=500,All response message: 

HTTP/1.1 500   

Cache-Control: no-cache

Content-Type: text/plain: charset-utf-8

server: envoy

Content-security-policy: sandbox allow-forms allow-scripts 

x-content-type-option: nosiff

accept-encoding: identity,gzip

x-dropbox-response-origin: far_remote 

use code like: WinHttpConnect(hin,"api.dropboxapi.com",443,0);

                 WinHttpOpenRequest(**,"POST", 2/files/delete_v2.**);

                 WinHttpAddRequestHeader("Authorization: Bearer *******");

                 WinHttpAddRequestHeader("Content-type: application/json");

                WinhttpSendRequest(**, "{\"path\": \"/work/path\"}");

Thanks for following up. Can you please share the rest of the requested information so we can look up these errors? Thanks in advance!