This functionality is experimental and may be changed or removed completely in a
future release. Elastic will take a best effort approach to fix any issues, but
experimental features are not subject to the support SLA of official GA
features.
Found unexpected or unknown characters
editFound unexpected or unknown characters
editEither there is a problem with the structure of your config file, or you have used a path or expression that the YAML parser cannot resolve because the config file contains characters that aren’t properly escaped.
If the YAML file contains paths with spaces or unusual characters, wrap the paths in single quotation marks (see Wrap paths in single quotation marks).
Also see the general advice under Avoid YAML formatting problems.