bug fixes

app.py

@@ -104,7 +104,12 @@ with gr.Blocks(theme = theme) as demo:
 
         # String typed by user
         text = history[-1][0]
-        search_keyword = find_best_keyword_match(keywords, text)
+        print("User Input:", text)
+        
+        if text != "":
+           search_keyword = find_best_keyword_match(keywords, text)     
+        else:   
+           search_keyword = "None"
 
         if search_keyword == "None":
            bot_message = "Sorry, don't know any restaurants at this location..." + " [DEBUG (params: " + url_params + ")]" 
@@ -134,11 +139,11 @@ with gr.Blocks(theme = theme) as demo:
 
 # Events handling
             
-    btn.click(user, [msg, chatbot], [msg, chatbot], queue=True, show_progress=False).then(
+    btn.click(user, [msg, chatbot], [msg, chatbot], queue=False, show_progress=False).then(
         bot, [chatbot, url_params], chatbot, concurrency_limit=50
     )
     
-    msg.submit(user, [msg, chatbot], [msg, chatbot], queue=True, show_progress=False).then(
+    msg.submit(user, [msg, chatbot], [msg, chatbot], queue=False, show_progress=False).then(
         bot, [chatbot, url_params], chatbot, concurrency_limit=50
     )
     
@@ -169,7 +174,7 @@ def levenshtein_distance(s1, s2):
     
     return previous_row[-1]
 
-def find_best_keyword_match(keywords, text, max_distance=3):
+def find_best_keyword_match(keywords, text, max_distance=5):
     """Find the best keyword match in the text, allowing for some misspelling."""
     text_normalized = normalize(text)
     best_match = None