I get this error in the latest cbd controller. This is also happening on some of the built in templates.
Infrastructure creation failed. Reason: Error in provisioning stack clustername: com.fasterxml.jackson.core.JsonParseException: Illegal unquoted character ((CTRL-CHAR, code 10)): has to be escaped using backslash to be included in string value at [Source: java.io.StringReader@6cca1463; line: 43, column: 63]
I think you using some strange character in your template can you paste here what are you using? (for sure without any sensitive data)
btw the stack name can contains only lowercase letters