How to Consume XSODATA service from HTML5 in HCP productive version

Hello

In our productive environment, we have created a odata service from tables defined in a hanaxs database(not MDC).

I can display the metadata with all the entities of the service with :

https://server/myapp/services/myservice.xsodata/$metadata

I have created a destination :

type : http

Url : https://server

proxy type : internet

authentication : AppToAppSSO

In additional Properties, i have set saml2_audience, WebIDEEnabled(true), WebIDESystem(destination name), WebIDEUsage(odata_gen, odata_xs)

When I try to create a Master/Detail app, the service Url selector find my destination.

I enter the service path : /myapp/services/myservice.xsodata

and an error 500 occurs

Any clue ?

Best regards

Emmanuel