Z-Image CLIPloader error

### Custom Node Testing

- [x] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Expected Behavior

I expect it to generate an image but it doesn't launch.

### Actual Behavior

Trying to launch Z-Image template both turbo and regular but it's not launching. Models downloaded. I got error message:

I am using ComfyUI 0.16.4 source from github on my linux system:
Kubuntu 24, kernel 6.12
NVIDIA drivers 580
python 3.12 (3.13, 3.14 app doesn't launch saying some packages missing)

### Steps to Reproduce

.

### Debug Logs

```powershell
# ComfyUI Error Report
## Error Details
- **Node ID:** 76:62
- **Node Type:** CLIPLoader
- **Exception Type:** json.decoder.JSONDecodeError
- **Exception Message:** Expecting value: line 1 column 1 (char 0)

## Stack Trace

File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 524, in execute
output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 333, in get_output_data
return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 307, in _async_map_node_over_list
await process_inputs(input_dict, i)

File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 295, in process_inputs
result = f(**inputs)
^^^^^^^^^^^

File "/home/jack/Software/ComfyUI-0.16.4/nodes.py", line 999, in load_clip
clip = comfy.sd.load_clip(ckpt_paths=[clip_path], embedding_directory=folder_paths.get_folder_paths("embeddings"), clip_type=clip_type, model_options=model_options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/home/jack/Software/ComfyUI-0.16.4/comfy/sd.py", line 1176, in load_clip
sd, metadata = comfy.utils.load_torch_file(p, safe_load=True, return_metadata=True)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/home/jack/Software/ComfyUI-0.16.4/comfy/utils.py", line 137, in load_torch_file
raise e

File "/home/jack/Software/ComfyUI-0.16.4/comfy/utils.py", line 117, in load_torch_file
sd, metadata = load_safetensors(ckpt)
^^^^^^^^^^^^^^^^^^^^^^

File "/home/jack/Software/ComfyUI-0.16.4/comfy/utils.py", line 89, in load_safetensors
header = json.loads(mapping[8:8+header_size].decode("utf-8"))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/usr/lib/python3.12/json/__init__.py", line 346, in loads
return _default_decoder.decode(s)
^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/usr/lib/python3.12/json/decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/usr/lib/python3.12/json/decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None

## System Information
- **ComfyUI Version:** 0.16.4
- **Arguments:** main.py
- **OS:** linux
- **Python Version:** 3.12.3 (main, Mar 3 2026, 12:15:18) [GCC 13.3.0]
- **Embedded Python:** false
- **PyTorch Version:** 2.10.0+cu128
## Devices

- **Name:** cuda:0 NVIDIA GeForce RTX 4060 Ti : cudaMallocAsync
- **Type:** cuda
- **VRAM Total:** 16720199680
- **VRAM Free:** 15669592064
- **Torch VRAM Total:** 0
- **Torch VRAM Free:** 0

## Logs

2026-03-10T11:44:21.846893 - Adding extra search path checkpoints /media/disk-ternary/comfyui_models/checkpoints
2026-03-10T11:44:21.846995 - Adding extra search path text_encoders /media/disk-ternary/comfyui_models/text_encoders
2026-03-10T11:44:21.847030 - Adding extra search path text_encoders /media/disk-ternary/comfyui_models/clip
2026-03-10T11:44:21.847057 - Adding extra search path clip_vision /media/disk-ternary/comfyui_models/clip_vision
2026-03-10T11:44:21.847084 - Adding extra search path configs /media/disk-ternary/comfyui_models/configs
2026-03-10T11:44:21.847106 - Adding extra search path controlnet /media/disk-ternary/comfyui_models/controlnet
2026-03-10T11:44:21.847129 - Adding extra search path diffusion_models /media/disk-ternary/comfyui_models/diffusion_models
2026-03-10T11:44:21.847150 - Adding extra search path diffusion_models /media/disk-ternary/comfyui_models/unet
2026-03-10T11:44:21.847170 - Adding extra search path embeddings /media/disk-ternary/comfyui_models/embeddings
2026-03-10T11:44:21.847196 - Adding extra search path loras /media/disk-ternary/comfyui_models/loras
2026-03-10T11:44:21.847216 - Adding extra search path upscale_models /media/disk-ternary/comfyui_models/upscale_models
2026-03-10T11:44:21.847238 - Adding extra search path vae /media/disk-ternary/comfyui_models/vae
2026-03-10T11:44:21.847259 - Adding extra search path audio_encoders /media/disk-ternary/comfyui_models/audio_encoders
2026-03-10T11:44:21.847279 - Adding extra search path model_patches /media/disk-ternary/comfyui_models/model_patches
2026-03-10T11:44:24.058837 - WARNING: You need pytorch with cu130 or higher to use optimized CUDA operations.
2026-03-10T11:44:24.058902 - Found comfy_kitchen backend triton: {'available': True, 'disabled': True, 'unavailable_reason': None, 'capabilities': ['apply_rope', 'apply_rope1', 'dequantize_nvfp4', 'dequantize_per_tensor_fp8', 'quantize_nvfp4', 'quantize_per_tensor_fp8']}
2026-03-10T11:44:24.058939 - Found comfy_kitchen backend eager: {'available': True, 'disabled': False, 'unavailable_reason': None, 'capabilities': ['apply_rope', 'apply_rope1', 'dequantize_nvfp4', 'dequantize_per_tensor_fp8', 'quantize_nvfp4', 'quantize_per_tensor_fp8', 'scaled_mm_nvfp4']}
2026-03-10T11:44:24.058967 - Found comfy_kitchen backend cuda: {'available': True, 'disabled': True, 'unavailable_reason': None, 'capabilities': ['apply_rope', 'apply_rope1', 'dequantize_nvfp4', 'dequantize_per_tensor_fp8', 'quantize_nvfp4', 'quantize_per_tensor_fp8', 'scaled_mm_nvfp4']}
2026-03-10T11:44:24.065636 - Checkpoint files will always be loaded safely.
2026-03-10T11:44:24.210178 - Total VRAM 15946 MB, total RAM 32035 MB
2026-03-10T11:44:24.210222 - pytorch version: 2.10.0+cu128
2026-03-10T11:44:24.210416 - Set vram state to: NORMAL_VRAM
2026-03-10T11:44:24.210585 - Device: cuda:0 NVIDIA GeForce RTX 4060 Ti : cudaMallocAsync
2026-03-10T11:44:24.210667 - Using async weight offloading with 2 streams
2026-03-10T11:44:24.210779 - Enabled pinned memory 30432.0
2026-03-10T11:44:24.213779 - working around nvidia conv3d memory bug.
2026-03-10T11:44:24.405354 - Using pytorch attention
2026-03-10T11:44:26.235742 - DynamicVRAM support detected and enabled
2026-03-10T11:44:26.235788 - Python version: 3.12.3 (main, Mar 3 2026, 12:15:18) [GCC 13.3.0]
2026-03-10T11:44:26.235817 - ComfyUI version: 0.16.4
2026-03-10T11:44:26.238475 - ComfyUI frontend version: 1.39.19
2026-03-10T11:44:26.239103 - [Prompt Server] web root: /home/jack/Software/ComfyUI-0.16.4/venv/lib/python3.12/site-packages/comfyui_frontend_package/static
2026-03-10T11:44:27.149588 -
Import times for custom nodes:
2026-03-10T11:44:27.149641 - 0.0 seconds: /home/jack/Software/ComfyUI-0.16.4/custom_nodes/websocket_image_save.py
2026-03-10T11:44:27.149671 -
2026-03-10T11:44:27.151503 - Context impl SQLiteImpl.
2026-03-10T11:44:27.151543 - Will assume non-transactional DDL.
2026-03-10T11:44:27.177290 - Assets scan(roots=['models']) completed in 0.024s (created=0, skipped_existing=14, orphans_pruned=0, total_seen=14)
2026-03-10T11:44:27.229756 - Starting server

2026-03-10T11:44:27.229948 - To see the GUI go to: http://127.0.0.1:8188
2026-03-10T13:25:32.536303 - got prompt
2026-03-10T13:25:32.562621 - Using pytorch attention in VAE
2026-03-10T13:25:32.563866 - Using pytorch attention in VAE
2026-03-10T13:25:32.972962 - VAE load device: cuda:0, offload device: cpu, dtype: torch.bfloat16
2026-03-10T13:25:32.978598 - !!! Exception during processing !!! Expecting value: line 1 column 1 (char 0)
2026-03-10T13:25:32.995574 - Traceback (most recent call last):
File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 524, in execute
output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 333, in get_output_data
return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 307, in _async_map_node_over_list
await process_inputs(input_dict, i)
File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 295, in process_inputs
result = f(**inputs)
^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/nodes.py", line 999, in load_clip
clip = comfy.sd.load_clip(ckpt_paths=[clip_path], embedding_directory=folder_paths.get_folder_paths("embeddings"), clip_type=clip_type, model_options=model_options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/comfy/sd.py", line 1176, in load_clip
sd, metadata = comfy.utils.load_torch_file(p, safe_load=True, return_metadata=True)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/comfy/utils.py", line 137, in load_torch_file
raise e
File "/home/jack/Software/ComfyUI-0.16.4/comfy/utils.py", line 117, in load_torch_file
sd, metadata = load_safetensors(ckpt)
^^^^^^^^^^^^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/comfy/utils.py", line 89, in load_safetensors
header = json.loads(mapping[8:8+header_size].decode("utf-8"))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/json/__init__.py", line 346, in loads
return _default_decoder.decode(s)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/json/decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/json/decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

2026-03-10T13:25:32.996759 - Prompt executed in 0.46 seconds
2026-03-10T13:26:53.755324 - got prompt
2026-03-10T13:26:53.760691 - !!! Exception during processing !!! Expecting value: line 1 column 1 (char 0)
2026-03-10T13:26:53.762278 - Traceback (most recent call last):
File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 524, in execute
output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 333, in get_output_data
return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 307, in _async_map_node_over_list
await process_inputs(input_dict, i)
File "/home/jack/Software/ComfyUI-0.16.4/execution.py", line 295, in process_inputs
result = f(**inputs)
^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/nodes.py", line 999, in load_clip
clip = comfy.sd.load_clip(ckpt_paths=[clip_path], embedding_directory=folder_paths.get_folder_paths("embeddings"), clip_type=clip_type, model_options=model_options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/comfy/sd.py", line 1176, in load_clip
sd, metadata = comfy.utils.load_torch_file(p, safe_load=True, return_metadata=True)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/comfy/utils.py", line 137, in load_torch_file
raise e
File "/home/jack/Software/ComfyUI-0.16.4/comfy/utils.py", line 117, in load_torch_file
sd, metadata = load_safetensors(ckpt)
^^^^^^^^^^^^^^^^^^^^^^
File "/home/jack/Software/ComfyUI-0.16.4/comfy/utils.py", line 89, in load_safetensors
header = json.loads(mapping[8:8+header_size].decode("utf-8"))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/json/__init__.py", line 346, in loads
return _default_decoder.decode(s)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/json/decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/json/decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

2026-03-10T13:26:53.763651 - Prompt executed in 0.01 seconds

## Attached Workflow
Please make sure that workflow does not contain any sensitive information such as API keys or passwords.

{"id":"9ae6082b-c7f4-433c-9971-7a8f65a3ea65","revision":0,"last_node_id":93,"last_link_id":113,"nodes":[{"id":35,"type":"MarkdownNote","pos":[-289.6666459954674,-158.6666723932416],"size":[510,420],"flags":{"collapsed":false},"order":0,"mode":0,"inputs":[],"outputs":[],"title":"Model link (for local users)","properties":{},"widgets_values":["## Model links\n\n**text_encoders**\n\n- [qwen_3_4b.safetensors](https://huggingface.co/Comfy-Org/z_image_turbo/resolve/main/split_files/text_encoders/qwen_3_4b.safetensors)\n\n**diffusion_models**\n\n- [z_image_bf16.safetensors](https://huggingface.co/Comfy-Org/z_image/resolve/main/split_files/diffusion_models/z_image_bf16.safetensors)\n\n**vae**\n\n- [ae.safetensors](https://huggingface.co/Comfy-Org/z_image_turbo/resolve/main/split_files/vae/ae.safetensors)\n\n\nModel Storage Location\n\n\n📂 ComfyUI/\n├── 📂 models/\n│ ├── 📂 text_encoders/\n│ │ └── qwen_3_4b.safetensors\n│ ├── 📂 diffusion_models/\n│ │ └── z_image_bf16.safetensors\n│ └── 📂 vae/\n│ 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```

### Other

_No response_