# Set an error message Post with an error message in the body (plain text) to register a new error. The new error will be displayed on any active GUI clients. Endpoint: POST /syncthing/system/error Version: 6.6.1 Security: ZelID ## Response 200 fields (application/json): - `status` (string) Explanation of status Enum: "success", "error" - `data` (string) The signature of the message encoded in base 64.