Web Service plugin

I am getting this error when i activate web service plugin.

elgg-web-services-master (guid: 43) cannot start and has been deactivated. Reason: Could not load the webservice:core library from C:/wamp/www/elgg-1.8.13/mod/web_services/lib/core.php

I am new to elgg. please help..

Beginning Developers

Beginning Developers

This space is for newcomers, who wish to build a new plugin or to customize an existing one to their liking