Car not starting - inadequate information?

[Thymme-Mouchrique]

It seems that there may be an issue with the endpoint https://api.volvocars.com/connected-vehicle/v2/vehicles/{vin}/commands/engine-start. I have attempted to use it with both a locked and an unlocked car, but it does not seem to work. The response returned is as follows:

Request failed with status code: 500
Response: {
"error" : {
"message" : "INTERNAL_SERVER_ERROR",
"description" : "Error returned from car"
}
}

The API response data for available commands indicates that this function is supported for my vehicle, as shown below:
{
"command" : "ENGINE_START",
"href" : "/v2/vehicles/YV1LFK2UCL1613779/commands/engine-start"
}

Could there be specific conditions or circumstances under which this function is unavailable, which are not mentioned in the documentation?