PaddleOCR-VL runtime error: image_features is None in FastDeploy 2.4.0

Bug Description

Hello, I am trying to serve PaddleOCR-VL using the latest version of FastDeploy. However, I encounter the following error during runtime. I would like to understand what might be causing this issue and how it can be resolved.

Environment

fastdeploy-gpu 2.4.0
paddlepaddle-gpu 3.3.0

Error Message

Traceback (most recent call last):
  File "/path/to/env/lib/python3.12/site-packages/fastdeploy/worker/worker_process.py", line 1089, in <module>
    run_worker_proc()
  File "/path/to/env/lib/python3.12/site-packages/fastdeploy/worker/worker_process.py", line 1085, in run_worker_proc
    worker_proc.event_loop_normal()
  File "/path/to/env/lib/python3.12/site-packages/fastdeploy/worker/worker_process.py", line 522, in event_loop_normal
    self.worker.execute_model(req_dicts, max_occupied_batch_index)
  File "/path/to/env/lib/python3.12/site-packages/fastdeploy/worker/gpu_worker.py", line 193, in execute_model
    output = self.model_runner.execute_model(model_forward_batch, num_running_request)
  File "/path/to/env/lib/python3.12/site-packages/fastdeploy/worker/gpu_model_runner.py", line 2238, in execute_model
    model_output = self.model(
  File "/path/to/env/lib/python3.12/site-packages/paddle/nn/layer/layers.py", line 1833, in __call__
    return self.forward(*inputs, **kwargs)
  File "/path/to/env/lib/python3.12/site-packages/fastdeploy/model_executor/models/paddleocr_vl/paddleocr_vl.py", line 240, in forward
    input_embeddings = self.get_input_embeddings(
  File "/path/to/env/lib/python3.12/site-packages/fastdeploy/model_executor/models/paddleocr_vl/paddleocr_vl.py", line 231, in get_input_embeddings
    input_embeddings[image_mask] = image_features.cast(self._dtype)
AttributeError: 'NoneType' object has no attribute 'cast'