Fix jobs done

app/Models/Activity.php

@@ -188,6 +188,8 @@ class Activity extends Model
                 return 0;
         if(!$dataPlan = AssignMaterial::where('activity_id', $this->id)->get())
                 return 0;
+    if($dataPlan->isEmpty())
+        return 0;
 		if($dataPlan[0]->status_activity == 'done')
 				return 100;
 		return $this->persentase_progress;