An error occurred: Executor error during aggregate command on namespace: collection_db.collection_en :: caused by :: Error connecting to localhost:28000 (127.0.0.1:28000) :: caused by :: onInvoke :: caused by :: Connection refused, full error: {'ok': 0.0, 'errmsg': 'Executor error during aggregate command on namespace: collection_db.collection_en :: caused by :: Error connecting to localhost:28000 (127.0.0.1:28000) :: caused by :: onInvoke :: caused by :: Connection refused', 'code': 6, 'codeName': 'HostUnreachable', '$clusterTime': {'clusterTime': Timestamp(1765900461, 1), 'signature': {'hash': b'\x8c\x92A\xfa\xfc\x920\x08\x97P6\x88Sn\x0fr\x89\xf0tC', 'keyId': 7528148496663183362}}, 'operationTime': Timestamp(1765900461, 1)}