Getting UnrecognizedClientException error

[camilalbmaia]

I'm following the steps to use dynamodb-parallel-scan, but I'm getting the following error with the two latest versions (3.4.0 and 3.5.0):

UnrecognizedClientException: The security token included in the request is invalid.
      at throwDefaultError ([/var/task/node_modules/@aws-sdk/smithy-client/dist-cjs/default-error-handler.js:8:22](mailto:/var/task/node_modules/@aws-sdk/smithy-client/dist-cjs/default-error-handler.js:8:22))
      at [/var/task/node_modules/@aws-sdk/smithy-client/dist-cjs/default-error-handler.js:18:39](mailto:/var/task/node_modules/@aws-sdk/smithy-client/dist-cjs/default-error-handler.js:18:39)
      at de_DescribeTableCommandError ([/var/task/node_modules/@aws-sdk/client-dynamodb/dist-cjs/protocols/Aws_json1_0.js:1191:20](mailto:/var/task/node_modules/@aws-sdk/client-dynamodb/dist-cjs/protocols/Aws_json1_0.js:1191:20))
      at processTicksAndRejections (internal/process/task_queues.js:95:5)
      at async [/var/task/node_modules/@aws-sdk/middleware-serde/dist-cjs/deserializerMiddleware.js:7:24](mailto:/var/task/node_modules/@aws-sdk/middleware-serde/dist-cjs/deserializerMiddleware.js:7:24)
     at async [/var/task/node_modules/@aws-sdk/middleware-signing/dist-cjs/awsAuthMiddleware.js:14:20](mailto:/var/task/node_modules/@aws-sdk/middleware-signing/dist-cjs/awsAuthMiddleware.js:14:20)
      at async [/var/task/node_modules/@aws-sdk/middleware-retry/dist-cjs/retryMiddleware.js:27:46](mailto:/var/task/node_modules/@aws-sdk/middleware-retry/dist-cjs/retryMiddleware.js:27:46)
      at async [/var/task/node_modules/@aws-sdk/middleware-logger/dist-cjs/loggerMiddleware.js:7:26](mailto:/var/task/node_modules/@aws-sdk/middleware-logger/dist-cjs/loggerMiddleware.js:7:26)
      at async getTableItemsCount ([/var/task/node_modules/@shelf/dynamodb-parallel-scan/lib/ddb.js:42:16](mailto:/var/task/node_modules/@shelf/dynamodb-parallel-scan/lib/ddb.js:42:16))
      at async Object.parallelScanAsStream ([/var/task/node_modules/@shelf/dynamodb-parallel-scan/lib/parallel-scan-stream.js:25:26](mailto:/var/task/node_modules/@shelf/dynamodb-parallel-scan/lib/parallel-scan-stream.js:25:26)) { 
    '$fault': 'client',
    '$metadata': {
      httpStatusCode: 400,
      requestId: '9N2RIU65LR9UBHDFLOADD656OVVV4KQNSO5AEMVJF66Q9ASUAAJG',
      extendedRequestId: undefined,
      cfId: undefined,
      attempts: 1,
      totalRetryDelay: 0
    },
    __type: 'com.amazon.coral.service#UnrecognizedClientException'
  }

It works fine with version 3.3.0.

Do I need to use it in a different way for the latest versions? I'm using 'parallelScanAsStream'.