Website Gives a 500 error using local-php

[wo-r]

[PRIVATEWEBSITE].000webhostapp.com is currently unable to handle this request.
HTTP ERROR 500

I Dont Understand the problem. am i using a wrong php version?

[wo-r]

UPDATE
FOund why. Used a wrong var in api.

but it outputs "{ "result": { "success": false, "error": "Function not implemented" } }" now