ResRobot Route Planner API

When the origination and destination are close to each other I am getting 
{ 
"Error code": "INT_ERR", 
"error text": "Internal Error" 
}

in response.
Also, if the points are not that close but I put products as taxis (Products = 1) in the API, I am getting the same problem.

here is my API request:

https://api.resrobot.se/v2/trip?format=json&originCoordLat=59.34901668702065&originCoordLong=17.998769171341838&key=<MY_KEY>&destCoordLat=59.33107982895953&destCoordLong=18.07151206764917&products=1