Sent GET to the aaicontextbuilder:

http://127.0.0.1:8080/aaicontextbuilder/v2/service/context?serviceInstanceId=PombaDemoCust_001-ServiceInst-001&modelVersionId=e2d52f32-a952-46f5-800c-c250903625d6&modelInvariantId=59dd4d63-8f21-406c-98c0-3b057bb86820

Got back:
{
"timestamp": "2019-03-06T19:56:55.364+0000",
"status": 500,
"error": "Internal Server Error",
"message": "Internal Server Error",
"path": "/aaicontextbuilder/v2/service/context"
}

No error was seen in any log file,