Hi,
We use Webpack to bundle our server-side code.
At the moment, the version of request-promise used by this SDK is 3 which has a problem with a dependency on cls-bluebird.
The error we get from the bundler is:

ERROR in ./node_modules/request-promise/lib/rp.js
Module not found: Error: Can't resolve 'cls-bluebird' in '/Users/--/--/node_modules/request-promise/lib'

This issue:
request/request-promise#91
Describes the cause, a workaround and a final fix in the 4 version of request-promise.

Are you able to upgrade the dependency to version 4 and resolve this problem?