Tekton Task not Expanding Parameters (OpenShift)

Question

I am unable to pass parameters to a Tekton task via the CLI or via TaskRun YAML.

Task file

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: ubuntu-test
  namespace: tekton-pipelines
spec:
  params:
    - name: var
      type: string
  steps:
    - env:
        - name: VAR
          value: $(params.var)
      image: ubuntu
      name: ''
      resources: {}
      script: |
        #!/usr/bin/env bash
        echo "Hello from Bash $VAR!"

TaskRun file

apiVersion: tekton.dev/v1beta1
kind: TaskRun
metadata:
  name: ubuntu-test-with-parameters
spec:
  taskRef:
    name: ubuntu-test
  params:
    - name: var
      value:
        - "John"

Regardless if I apply the TaskRun via the YAML file above or run tkn task start --showlog ubuntu-test -p var=John I receive the following output:

[unnamed-0] Hello from Bash $(params.var)!

Environment Info

PS > tkn version
Client version: 0.16.0
Pipeline version: v0.10.1
Triggers version: v0.11.2
Dashboard version: v0.14.0

PS > oc version
Client Version: 4.6.16
Server Version: 4.6.15
Kubernetes Version: v1.19.0+1833054

Answer 1

It turns out the v10.1.1 pipeline release does not support the v1beta1 API version. I had followed an outdated tutorial here that installs an outdated version of Pipelines via an improperly tagged "latest" release.

If anyone comes across a similar issue, make sure your versions match the expected latest version of the GitHub release.