/home/runner/work/librustzcash/librustzcash/./.github/actions/prepare/action.yml: (Line: 32, Col: 9, Idx: 766) - (Line: 34, Col: 17, Idx: 826): While parsing a block mapping, did not find expected key.

System.ArgumentException: Unexpected type '' encountered while reading 'action manifest root'. The type 'MappingToken' was expected. at GitHub.DistributedTask.ObjectTemplating.Tokens.TemplateTokenExtensions.AssertMapping(TemplateToken value, String objectDescription) at GitHub.Runner.Worker.ActionManifestManager.Load(IExecutionContext executionContext, String manifestFile)