Create app.py

app.py

@@ -0,0 +1,21 @@
+import gradio as gr
+
+
+# MultimodalTextbox in ChatInterface - validation error is invisible
+def validate_input(x):
+    return gr.validate(x["text"] != "error", "Can't be error")
+
+
+def do_chat(message, history):
+    yield "You typed: " + message["text"]
+
+
+demo = gr.ChatInterface(
+    fn=do_chat,
+    validator=validate_input,
+    multimodal=True,
+    show_progress="full",
+)
+
+if __name__ == "__main__":
+    demo.launch()