Azure DevOpos pipeline Yaml variables not substituting azureResourceManagerConnection

While setting up an Azure ARM deployment pipeline using yaml. Below is my template.yaml file parameters: - name: azRMConnection type: string - name: subscriptionID type: string - name: resourceGroupName type: string - name: deploymentLocation type: string default: "[resourceGroup().location]" - name: armTemplateFilePath type: string - name: armTemplateParameterFilePath type: string - name: overrideParameters type: string steps: - task: AzureResourceManagerTemplateDeployment@3 displayName: "ARM Template Deployment" inputs: deploymentScope: 'Resource Group' azureResourceManagerConnection: '${{parameters.azRMConnection}}' deploymentMode: Incremental subscriptionId: ${{parameters.subscriptionID}} action: 'Create Or Update Resource Group' resourceGroupName: ${{parameters.resourceGroupName}} location: ${{parameters.deploymentLocation}} templateLocation: Linked artifact csmFile: ${{parameters.armTemplateFilePath}} csmParametersFile: ${{parameters.armTemplateParameterFilePath}} overrideParameters: "${{parameters.overrideParameters}}" And this is my actual main.yaml looks like