How to resolve 'UsePythonVersion@0' task failure on self hosted agent

I am trying to create a simple pipeline where python application code will be pulled from github enterprise and will be executed on the agent server itself. Here I am using Self hosted agent on a Linux VM.

trigger:
  branches:
    include:
      - master
      - refs/tags/*
      - feature*

stages:
  - stage: Deploy
    condition: and(succeeded(), or(eq(variables['Build.SourceBranch'], 'refs/heads/master'), startsWith(variables['Build.SourceBranch'], 'refs/tags'), startsWith(variables['Build.SourceBranch'], 'refs/heads/feature')))
    jobs:
      - job: 'RunDeploymentCommandJob'
        displayName: Deploying job
        pool:
          name: Ppe-Gear-Price-Agent-Pool
        steps:
          - task: UsePythonVersion@0
            inputs:
              versionSpec: '3.6'  # Use Python 3.x
              addToPath: true
          - script: |
              cd gear-price-publisher
              # Install dependencies if needed
              pip install -r requirements.txt
              # Run the Python code
              gunicorn -w 1 -b 0.0.0.0:80 controller:app
            displayName: 'Run Python Code'

While code is successfully checked out Github Enterprise, UsePythonVersion task is getting failed with the below error for Gihub:

##[warning]You should provide GitHub token if you want to download a python release. Otherwise you may hit the GitHub anonymous download limit.
##[error]Failed to download Python from the Github Actions python registry (https://github.com/actions/python-versions). Error: AggregateError
##[error]Version spec 3.6 for architecture x64 did not match any version in Agent.ToolsDirectory.

Could you please suggest on this.

Thanks

If the Linux agent(mine is ubuntu 20.04) is able to access the python download page https://github.com/actions/python-versions, you can use the task in pipeline:

- task: UsePythonVersion@0
  inputs:
    versionSpec: '3.6'
    addToPath: true
    architecture: 'x64'

It will download the python package and try to prepare the tool cache folder structure for you:

The tool cache structure on the agent machine:

To resolve the error in the log ./python: error while loading shared libraries: libpython3.6m.so.1.0: cannot open shared object file: No such file or directory, we can link it manually via command(change the path to your own):

sudo ln -s ~/myagent/_work/_tool/Python/3.6.15/x64/lib/libpython3.6m.so.1.0 /usr/lib/libpython3.6m.so.1.0 

After it's done, run again the pipeline: