Exceptions around saving snapshot were not being tracked

changedetectionio/update_worker.py

@@ -134,8 +134,8 @@ class update_worker(threading.Thread):
 
                         except Exception as e:
                             # Catch everything possible here, so that if a worker crashes, we don't lose it until restart!
-                            print("!!!! Exception in update_worker !!!\n", e)
-
+                            self.app.logger.error("Exception reached processing watch UUID: %s - %s", uuid, str(e))
+                            self.datastore.update_watch(uuid=uuid, update_obj={'last_error': str(e)})
                     finally:
                         # Always record that we atleast tried
                         self.datastore.update_watch(uuid=uuid, update_obj={'fetch_time': round(time.time() - now, 3),