nodegame-mturk unhandled promise when working on sandbox

[shakty]

And workers are actually in the real AMT

ng-amt$ uploadResults
error: "ApproveAssignment": RequestError - AWS.AccountNotLinked. To use the MTurk API, you will need an Amazon Web Services (AWS) Account. Your AWS account must be linked to your Amazon Mechanical Turk Account. Visit https://requestersandbox.mturk.com/developer to get started.:
error: "ApproveAssignment": RequestError - AWS.AccountNotLinked. To use the MTurk API, you will need an Amazon Web Services (AWS) Account. Your AWS account must be linked to your Amazon Mechanical Turk Account. Visit https://requestersandbox.mturk.com/developer to get started.:
info: tot results: 2
info: to approve: 2
info: to reject: 0

info: results processed: 2/2
info: approved: 0
info: rejected: 0
error: approve/reject failed: 2

error: "GetAccountBalance": RequestError - AWS.AccountNotLinked. To use the MTurk API, you will need an Amazon Web Services (AWS) Account. Your AWS account must be linked to your Amazon Mechanical Turk Account. Visit https://requestersandbox.mturk.com/developer to get started.:
(node:32578) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'FormattedPrice' of undefined
at /home/lieu/nodegame-mturk/lib/modules/balance.js:65:59
at /home/lieu/nodegame-mturk/lib/modules/balance.js:26:11
at retry (/home/lieu/nodegame-mturk/lib/core/api.js:169:25)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:188:7)
(node:32578) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:32578) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.