Custom API creation error

Summary

Custom API creation error

Content

I cant able to create new custom API and also i cant able to test already created custom API it shows following response. How to rectify it????

Test Response Status: 404

{

  "type": "http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.1",

  "status": 404,

  "title": "API is not bound to any implementation",

  "detail": "The API custom/M_Notifications(1.0) is not bound to any implementation. Check the value of a binding policy for this API (\"*.custom/M_Notifications(1.0).Routing_BindApiToImpl\").",

  "o:ecid": "005IvETm7hpA9T3_Rll3id0000xT0002NJ, 0:4:3:14",

  "o:errorCode": "MOBILE-57946",

  "o:errorPath": "/internal-tools/env/1.0/ui-tooling/endpoint/mobile/custom/M_Notifications/m_notifications"