Azure 应用服务部署管道任务错误：资源不存在/资源存在时出现 UnhandledPromiseRejectionWarning

Question

当资源明显存在时，运行使用 Azure 应用服务部署任务的 Azure DevOps 管道时出现以下错误。这种情况发生在历史上有效的现有管道中。

 ##[error]Error: Resource 'blah' doesn't exist. Resource should exist before deployment.
 (node:2432) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'getApplicationURL' of undefined
     at WindowsWebAppWebDeployProvider.<anonymous> (D:\a\_tasks\AzureRmWebAppDeployment_497d490f-eea7-4f2b-ab94-48d9c1acdcb1\4.195.4\deploymentProvider\AzureRmWebAppDeploymentProvider.js:54:73)
     at Generator.next (<anonymous>)
     at D:\a\_tasks\AzureRmWebAppDeployment_497d490f-eea7-4f2b-ab94-48d9c1acdcb1\4.195.4\deploymentProvider\AzureRmWebAppDeploymentProvider.js:8:71
     at new Promise (<anonymous>)
     at __awaiter (D:\a\_tasks\AzureRmWebAppDeployment_497d490f-eea7-4f2b-ab94-48d9c1acdcb1\4.195.4\deploymentProvider\AzureRmWebAppDeploymentProvider.js:4:12)
     at WindowsWebAppWebDeployProvider.UpdateDeploymentStatus (D:\a\_tasks\AzureRmWebAppDeployment_497d490f-eea7-4f2b-ab94-48d9c1acdcb1\4.195.4\deploymentProvider\AzureRmWebAppDeploymentProvider.js:48:16)
     at D:\a\_tasks\AzureRmWebAppDeployment_497d490f-eea7-4f2b-ab94-48d9c1acdcb1\4.195.4\azurermwebappdeployment.js:38:42
     at Generator.throw (<anonymous>)
     at rejected (D:\a\_tasks\AzureRmWebAppDeployment_497d490f-eea7-4f2b-ab94-48d9c1acdcb1\4.195.4\azurermwebappdeployment.js:6:65)
     at process._tickCallback (internal/process/next_tick.js:68:7)
 (node:2432) 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: 2)
 (node:2432) [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.

以下是此任务的 YAML：

- task: AzureRmWebAppDeployment@4
  displayName: 'Deploy'
  inputs:
    azureSubscription: ${{ parameters.ConnectedServiceName }}
    WebAppName: 'blah'
    packageForLinux: '$(Pipeline.Workspace)/Blah'
    enableCustomDeployment: true
    TakeAppOfflineFlag: false
    SetParametersFile: '$(Pipeline.Workspace)/Blah/TokenParameters.xml'
    RemoveAdditionalFilesFlag: true
    enableXmlTransform: false
    enableXmlVariableSubstitution: false
    AdditionalArguments: '-skip:objectName=dirPath,absolutePath=Angular'