[GraphHopper] Call load error

[Peter]

Please use e.g. this code

  if (hasError())
                {
                    log("Problem " + getErrorMessage(), getError());
                    logUser("Are you connected to the internet? Problem
while fetching remote area list: "
                            + getErrorMessage());
                    return;
                }

and report the stacktrace

Regards,
Peter.
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