runtime error

pers.py", line 312, in cache prediction = await Context.root_block.process_api( File "/home/user/.local/lib/python3.8/site-packages/gradio/blocks.py", line 1315, in process_api result = await self.call_function( File "/home/user/.local/lib/python3.8/site-packages/gradio/blocks.py", line 1043, in call_function prediction = await anyio.to_thread.run_sync( File "/home/user/.local/lib/python3.8/site-packages/anyio/to_thread.py", line 33, in run_sync return await get_asynclib().run_sync_in_worker_thread( File "/home/user/.local/lib/python3.8/site-packages/anyio/_backends/_asyncio.py", line 877, in run_sync_in_worker_thread return await future File "/home/user/.local/lib/python3.8/site-packages/anyio/_backends/_asyncio.py", line 807, in run result = context.run(func, *args) File "app.py", line 55, in FRFsegment imsave("label.png", pred) File "/home/user/.local/lib/python3.8/site-packages/skimage/io/_io.py", line 143, in imsave return call_plugin('imsave', fname, arr, plugin=plugin, **plugin_args) File "/home/user/.local/lib/python3.8/site-packages/skimage/io/manage_plugins.py", line 205, in call_plugin return func(*args, **kwargs) File "/home/user/.local/lib/python3.8/site-packages/imageio/v3.py", line 147, in imwrite encoded = img_file.write(image, **kwargs) File "/home/user/.local/lib/python3.8/site-packages/imageio/core/v3_plugin_api.py", line 367, in __exit__ self.close() File "/home/user/.local/lib/python3.8/site-packages/imageio/plugins/pillow.py", line 123, in close self._flush_writer() File "/home/user/.local/lib/python3.8/site-packages/imageio/plugins/pillow.py", line 457, in _flush_writer primary_image.save(self._request.get_file(), **self.save_args) File "/home/user/.local/lib/python3.8/site-packages/PIL/Image.py", line 2413, in save save_handler(self, fp, filename) File "/home/user/.local/lib/python3.8/site-packages/PIL/PngImagePlugin.py", line 1280, in _save raise OSError(msg) from e OSError: cannot write mode F as PNG

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