Plivo numbers.buy

[apex2060]

I am getting an error when attempting to purchase a new number through the node library:
All variables exist and are correct. I've tried just the number

let plivo = new Plivo.Client(process.env.plivoId, process.env.plivoToken);
plivo.numbers.buy(number.id).then(r=>{

let plivo = new Plivo.Client(process.env.plivoId, process.env.plivoToken);
plivo.numbers.buy(number.id, process.env.plivoApp).then(r=>{

returns an error:
2020-02-09T01:06:16.182390+00:00 app[web.1]: Error: {"api_id":"5f595aa6-4ad8-11ea-a859-0242ac110003","error":"not found"}
2020-02-09T01:06:16.182401+00:00 app[web.1]: at ResourceNotFoundError.PlivoRestError (/app/node_modules/plivo/dist/utils/exceptions.js:19:113)
2020-02-09T01:06:16.182401+00:00 app[web.1]: at new ResourceNotFoundError (/app/node_modules/plivo/dist/utils/exceptions.js:31:127)
2020-02-09T01:06:16.182402+00:00 app[web.1]: at Request._callback (/app/node_modules/plivo/dist/rest/request.js:80:20)
2020-02-09T01:06:16.182402+00:00 app[web.1]: at Request.self.callback (/app/node_modules/request/request.js:185:22)
2020-02-09T01:06:16.182402+00:00 app[web.1]: at Request.emit (events.js:223:5)
2020-02-09T01:06:16.182403+00:00 app[web.1]: at Request. (/app/node_modules/request/request.js:1161:10)
2020-02-09T01:06:16.182403+00:00 app[web.1]: at Request.emit (events.js:223:5)
2020-02-09T01:06:16.182403+00:00 app[web.1]: at IncomingMessage. (/app/node_modules/request/request.js:1083:12)
2020-02-09T01:06:16.182403+00:00 app[web.1]: at Object.onceWrapper (events.js:312:28)
2020-02-09T01:06:16.182404+00:00 app[web.1]: at IncomingMessage.emit (events.js:228:7)
2020-02-09T01:06:16.182404+00:00 app[web.1]: at endReadableNT (_stream_readable.js:1185:12)
2020-02-09T01:06:16.182404+00:00 app[web.1]: at processTicksAndRejections (internal/process/task_queues.js:81:21)

[nixonsam]

@apex2060 Looks like you're using the legacy SDK's method 'plivo.numbers.buy'. Please use the latest SDK.
You can find the code snippet here and you can install the SDK by referring to the instructions here

Feel free to contact our support team