Azure Devops Pipeline resource trigger error

Question

I have a C# solution with mutiple executable projects and I want to do a pipeline to build exe files and dependencies and another pipeline to generate multiple installers using Advanced Installer.

In the build pipeline I'm using the PublishPipelineArtifact@1 task at the end.

I have seen that I have two options to achieve this. Using classic release pipelines (it works properly). Another option seems to use yml pipeline triggered by the first pipeline. I have done it following docs but i'm getting an error configuring the trigger.

Configuring the trigger failed edit and save the pipeline again

trigger: none

pool:
   name: Default
   demands: 
   - Agent.Name -equals 'SelfHostedAgent'

resources:
  pipelines:
  - pipeline: 'projectCi'
    source: '\Folder\Project-CI' 
    trigger: true 

Answer 1

I have solved it. The problem was that the default branch doesn't have the pipeline defined. I have to set default branch via UI. Menu > Triggers > YAML > Get Sources > Default Branch