Because it was. This and ubuntu repo was not working on my PC during BT outage, other sites worked. After BT sorted it out I didn't have any problems. I asumme

Because it was. This and ubuntu repo was not working on my PC during BT outage, other sites worked. After BT sorted it out I didn't have any problems. I asumme that it was the issue with some BT connection between me and dropbox server