Docker - Unable to contact EngineAPI


I'm trying to create multiple docker container with a docker-compose.
I have 3 containers:
- bonita
- postgres
- webapps

In my webapp i have one application that's use EngineAPI to do some actions, like launch a process.
When i'm tryin to connect to bonitaEngine, i've got this error:

How to retrieve the business data structure of a process

Hi everyone

I'm new to Bonita and I'm trying to work with deployed processes via Engine API, so I need a documentation which can helps me to find the way, but I only have found the below documentation: