/server/licenseInfo returns 404 with the following content
{ "status": "Not Found", "detail": { "message": "validation status error: LICENSE_INVALID" } }
but this seems not to be reflected in the returned QError https://github.com/slamdata/purescript-quasar/blob/master/src/Quasar/Error.purs#L30
if this is the case then its not currently possible to tell between the difference between the license being invalid and the version of quasar not supporting this endpoint (i.e. not advanced).
alternatively perhaps quasar should not be return 404 but rather some other code?