Print errors while in debug mode

src/main/java/us/myles/ViaVersion/ViaVersionPlugin.java

@@ -54,6 +54,8 @@ public class ViaVersionPlugin extends JavaPlugin implements ViaVersionAPI {
             }).get(10, TimeUnit.SECONDS);
         } catch (Exception e) {
             System.out.println("Error fetching hand item: " + e.getClass().getName());
+            if(ViaVersion.getInstance().isDebug())
+            	e.printStackTrace();
             return null;
         }
     }
@@ -214,7 +216,8 @@ public class ViaVersionPlugin extends JavaPlugin implements ViaVersionAPI {
                 f.get(10, TimeUnit.SECONDS);
             }
         } catch (Exception e) {
-            System.out.println("Failed to run task.");
+            System.out.println("Failed to run task: " + e.getClass().getName());
+            if(ViaVersion.getInstance().isDebug())
             	e.printStackTrace();
         }
     }