fix a bug

Rodin.py

@@ -149,9 +149,9 @@ class Generator:
                 _, self.token = login(self.user_id, self.password)
                 continue
             else:
-                if not (prompt and task_uuid):
-                    prompt = preprocess_response.get('prompt', 'Default prompt if none returned')   
-                try:             
+                try:
+                    if not (prompt and task_uuid):
+                        prompt = preprocess_response.get('prompt', None)   
                     processed_image = "data:image/png;base64," + preprocess_response.get('processed_image', None)
                     success = True
                 except Exception as e:

app.py

@@ -165,11 +165,6 @@ with gr.Blocks() as demo:
     ).then(fn=clear_task, outputs=[cache_task_uuid, block_prompt, block_prompt_hint, fake3d], show_progress="hidden")
     
     button_generate.click(
-        fn=do_nothing, 
-        js=change_button_name, 
-        inputs=[cacha_empty],
-        outputs=[cacha_empty]
-    ).success(
         fn=generator.preprocess, 
         inputs=[block_prompt, block_image, cache_image_base64, cache_task_uuid], 
         outputs=[block_prompt, cache_image_base64],