/home/runner/work/vk-mini-apps-router/vk-mini-apps-router/./.github/actions/validation/action.yml (Line: 7, Col: 7): Required property is missing: shell

/home/runner/work/vk-mini-apps-router/vk-mini-apps-router/./.github/actions/validation/action.yml: (Line: 9, Col: 5, Idx: 154) - (Line: 9, Col: 5, Idx: 154): While parsing a block collection, did not find expected '-' indicator.

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)