The community members are discussing issues with using the expression editor, specifically how to add system.params.slug to a RESOURCE query. The comments suggest trying different approaches, such as removing the part after system, using backticks instead of single quotes, and deleting a backslash n. Eventually, the issue is resolved, and one community member notes that the syntax is related to JavaScript template literals. Another community member mentions that this discussion has sparked an internal discussion to improve the expression editor experience, and provides a link to a related issue on GitHub.