phpDocumentor/phpDocumentor/master/action.yml (Line: 18, Col: 17): A sequence was not expected

System.ArgumentException: Unexpected type 'SequenceToken' encountered while reading 'entrypoint'. The type 'StringToken' was expected. at GitHub.DistributedTask.ObjectTemplating.Tokens.TemplateTokenExtensions.AssertString(TemplateToken value, String objectDescription) at GitHub.Runner.Worker.ActionManifestManager.ConvertRuns(IExecutionContext executionContext, TemplateContext templateContext, TemplateToken inputsToken, String fileRelativePath, MappingToken outputs) at GitHub.Runner.Worker.ActionManifestManager.Load(IExecutionContext executionContext, String manifestFile)