Failure when generating Javascript Swagger client

Hello, 

We are trying to generate a Javascript Swagger client for OpenMBEE's MMS tool by taking the YAML file at https://mms.openmbee.org/alfresco/mms/mms.swagger.yaml and coping it into https://editor.swagger.io/. However, we get an error:

Failed to load resource: the server responded with a status of 400 (). 
Uncaught (in promise) Error
at http.js:177
at l (runtime.js:63)

We can successfully generate clients with this YAML file for other languages (Python or javascipt-closure-angular), but not for Javascript.

Any thoughts or pointers about this from this group?

Regards,

Jeremy Beale
Phoenix Integration