Update app.py

app.py

@@ -156,7 +156,7 @@ with gr.Blocks() as demo:
     with gr.Tabs() as tabs:
         with gr.TabItem("Upload", id=0):
             file = gr.File(label="Upload a preset (.json)", file_types=[".json"])
-            file.input(fn=load_from_file, inputs=[file], outputs=[preset, preset_error])
+            file.upload(fn=load_from_file, inputs=[file], outputs=[preset, preset_error])
             url_input = gr.Textbox(label="Enter a URL to a preset (.json) - press Enter to submit")
             url_input.submit(fn=load_from_url, inputs=[url_input], outputs=[preset, preset_error])
         with gr.TabItem("Viewer", id=1):