runtime error

Exit code: 3. Reason: /site-packages/keras/src/legacy/saving/saving_utils.py", line 89, in model_from_config return serialization.deserialize_keras_object( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/site-packages/keras/src/legacy/saving/serialization.py", line 492, in deserialize_keras_object deserialized_obj = cls.from_config( ^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/site-packages/keras/src/models/sequential.py", line 397, in from_config model.add(layer) File "/usr/local/lib/python3.12/site-packages/keras/src/models/sequential.py", line 122, in add self._maybe_rebuild() File "/usr/local/lib/python3.12/site-packages/keras/src/models/sequential.py", line 149, in _maybe_rebuild self.build(input_shape) File "/usr/local/lib/python3.12/site-packages/keras/src/layers/layer.py", line 232, in build_wrapper original_build_method(*args, **kwargs) File "/usr/local/lib/python3.12/site-packages/keras/src/models/sequential.py", line 195, in build x = layer(x) ^^^^^^^^ File "/usr/local/lib/python3.12/site-packages/keras/src/utils/traceback_utils.py", line 122, in error_handler raise e.with_traceback(filtered_tb) from None File "/usr/local/lib/python3.12/site-packages/keras/src/layers/reshaping/flatten.py", line 76, in compute_output_spec output_shape = self.compute_output_shape(inputs.shape) ^^^^^^^^^^^^ AttributeError: Exception encountered when calling Flatten.call(). 'list' object has no attribute 'shape' Arguments received by Flatten.call(): • args=(['<KerasTensor shape=(None, 7, 7, 512), dtype=float32, sparse=False, ragged=False, name=keras_tensor_37>'],) • kwargs=<class 'inspect._empty'> [2026-07-21 13:38:57 +0000] [7] [INFO] Worker exiting (pid: 7) [2026-07-21 13:38:57 +0000] [1] [ERROR] Worker (pid:7) exited with code 3 [2026-07-21 13:38:57 +0000] [1] [ERROR] Shutting down: Master [2026-07-21 13:38:57 +0000] [1] [ERROR] Reason: Worker failed to boot.

Container logs: