Azure DevOps Pipeline Variables Group Error - azure-devops

Question

I have this problem. When trying to use variable groups with conditional templates pipeline gives me this error:
templates/vars-qa.yml (Line: 9, Col: 1): While parsing a block mapping, did not find expected key.
Here is the azure-pipelines.yml
trigger:
- main
- qa
- development
- staging
#//
resources:
- repo: self
variables:
- ${{ if eq(variables['Build.SourceBranch'], 'refs/heads/main') }}:
- template: templates/vars-qa.yml
- ${{ if eq(variables['Build.SourceBranch'], 'refs/heads/qa') }}:
- template: templates/vars-qa.yml
- ${{ if eq(variables['Build.SourceBranch'], 'refs/heads/development') }}:
- template: templates/vars-dev.yml
- ${{ if eq(variables['Build.SourceBranch'], 'refs/heads/staging') }}:
- template: templates/vars-qa.yml
stages:
- template: templates/transform-settings.yml
- template: templates/build-image.yml
And vars-qa.yml where error is happen:
variables:
imageRepository: 'service-qa'
dockerRegistryServiceConnection: 'dec124f0-814f-4511-94d3-b3396698767508'
containerRegistry: 'test.azurecr.io'
imagePullSecret: 'test1334fe31-auth'
dockerfilePath: '**/Dockerfile'
vmImageName: 'ubuntu-latest'
tag: '$(Build.BuildId)'
- group: dev-secrets
- name: ConnectionStrings.DefaultConnection
value: $(psql-conn-str-dev)
This is happen in -group: dev-secrets.The group is existing and the psql-conn-str-dev already to.I have tried with $(variables.psql-conn-str-dev) but result was the same. Everything works correctly without templates

Answer 1

There is a problem in the indent of your template YAML.
You cannot define a sequence item when in a mapping.
Please try and use an online YAML validator tool to check this:
https://codebeautify.org/yaml-validator
I converted your variables to sequence items.
I think this will work better:
variables:
- name: imageRepository
value: 'service-qa'
- name: dockerRegistryServiceConnection
value: 'dec124f0-814f-4511-94d3-b3396698767508'
- name: containerRegistry
value: 'test.azurecr.io'
- name: imagePullSecret
value: 'test1334fe31-auth'
- name: dockerfilePath
value: '**/Dockerfile'
- name: vmImageName
value: 'ubuntu-latest'
- name: tag
value: '$(Build.BuildId)'
- group: dev-secrets
- name: ConnectionStrings.DefaultConnection
value: $(psql-conn-str-dev)