catch process mine window logic

src/engine/objects/Mine.java

@@ -664,6 +664,7 @@ public class Mine extends AbstractGameObject {
     public static void processMineWindows() {
         LocalDateTime currentTime = LocalDateTime.now();
         for (Mine mine : Mine.getMines()) {
+            try {
                 Building tower = BuildingManager.getBuildingFromCache(mine.getBuildingID());
                 //if the tower comes back null, skip this mine
                 if (tower == null)
@@ -693,6 +694,9 @@ public class Mine extends AbstractGameObject {
                         ChatManager.chatSystemChannel(tower.getGuild().getNation().getName() + "  has successfully defended the " + mine.getParentZone().getName() + " " + mine.getMineType() + " MINE, and retains their claim.");
                     }
                 }
+            } catch (Exception ex) {
+                Logger.error("Mine Failed: " + mine.getObjectUUID() + " " + ex.getMessage());
+            }
         }
     }
 }