openjournals/gh-action-juliacon-pdf-generation/crossref/action.yml (Line: 39, Col: 22): The expression is not closed. An unescaped ${{ sequence was found, but the closing }} sequence was not found.

GitHub.DistributedTask.ObjectTemplating.TemplateValidationException: The template is not valid. openjournals/gh-action-juliacon-pdf-generation/crossref/action.yml (Line: 39, Col: 22): The expression is not closed. An unescaped ${{ sequence was found, but the closing }} sequence was not found. at GitHub.DistributedTask.ObjectTemplating.TemplateValidationErrors.Check() 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)