AssertionError: No event data

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Could you please help me figure out why I'm getting this error when I run python gradio_canny2image.py as soon as I hit run of the UI????

>python gradio_canny2image.py
logging improved.
No module 'xformers'. Proceeding without it.
ControlLDM: Running in eps-prediction mode
DiffusionWrapper has 859.52 M params.
making attention of type 'vanilla' with 512 in_channels
Working with z of shape (1, 4, 32, 32) = 4096 dimensions.
making attention of type 'vanilla' with 512 in_channels
Loaded model config from [./models/cldm_v15.yaml]
Loaded state_dict from [./models/control_sd15_canny.pth]
Running on local URL: http://myurladdress:7860

To create a public link, set `share=True` in `launch()`.
Task exception was never retrieved
future: exception=AssertionError('No event data')>
Traceback (most recent call last):
File "C:\Users\username\AppData\Local\anaconda3\envs\control\lib\site-packages\gradio\queueing.py", line 338, in process_events
response = await self.call_prediction(awake_events, batch)
File "C:\Users\username\AppData\Local\anaconda3\envs\control\lib\site-packages\gradio\queueing.py", line 298, in call_prediction
assert data is not None, "No event data"
AssertionError: No event data

Start by reproducing the issue with python gradio_canny2image.py and triggering the UI action described in the report. Inspect the event-handling path represented by Gradio's queueing.py traceback and determine why event data is absent; the issue is complete when the action no longer raises AssertionError: No event data.

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