Error: no value assigned to required variable a. Assignment can be done using "--var", by setting the BUNDLE_VAR_a environment variable, or in .databricks/bundle/<target>/variable-overrides.json file

Name: empty${var.a}
Target: default
Workspace:
  User: $USERNAME
  Path: /Workspace/Users/$USERNAME/.bundle/empty${var.a}/default

Found 1 error

Exit code: 1