Error reported to CLI console when running any rest fuction.

[rcojoe]

Running a command like this: wp product get 1234

outputs below message before actual results. It makes parsing the response difficult.

Warning: call_user_func() expects parameter 1 to be a valid callback, cannot access private method Disqus_Rest_Api::dsq_get_settings_schema() in /wp-includes/rest-api/class-wp-rest-server.php on line 1160

[ryanvalentin]

This should be a quick fix, thanks!