If I understand it correctly this is no bug...For some time now the resources at all provinces except the Hope Village, are limited. This means that if other players have dug all of them you will not be able to see any resources when you go to dig.
Resources refill every 24 hours, if you are still not be able to dig something tomorrow means that many players are harvesting this area...So you can change place or log in and dig other times of day before the area run out from resources (if you have some quest or something).