Can't install ucpnode - Failed to run installation scripts

Getting error when trying to install module ucpnode:

[root@freepbx-b bin]# amportal a ma install ucpnode

Fetching FreePBX settings with gen_amp_conf.php…

module.js:340
throw err;
^
Error: Cannot find module 'inherits’
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object. (/usr/lib/node_modules/npmconf/npmconf.js:3:16)
at Module._compile (module.js:456:26)
at Object.Module._extensions…js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
Node Package Manager is not installed
Unable to install module ucpnode:

  • Failed to run installation scripts

Any ideas?