diff --git a/lib_comfyui/custom_extension_injector.py b/lib_comfyui/custom_extension_injector.py
index 8bbda2f..d00b225 100644
--- a/lib_comfyui/custom_extension_injector.py
+++ b/lib_comfyui/custom_extension_injector.py
@@ -72,9 +72,13 @@ def patch_prompt_server_add_routes(parsed_class: ast.ClassDef, custom_scripts_pa
 
     ...
         def add_routes(self):
+            self.user_manager.add_routes(self.routes)
             self.app.add_routes(self.routes)
+
+            [...]
+
             self.app.add_routes([
-                    <- add code right there in the list
+                <- add code right there in the list
                 web.static('/', self.web_root, follow_symlinks=True),
             ])
     ...
@@ -84,9 +88,11 @@ def add_routes(self):
         code_patch = generate_prompt_server_add_routes_code_patch(custom_scripts_path)
         extra_line_of_code = ast.parse(code_patch)
         try:
-            add_routes_ast_function.body[2].value.args[0].elts[0:0] = [extra_line_of_code.body[0].value]
+            add_routes_ast_function.body[3].value.args[0].elts[0:0] = [extra_line_of_code.body[0].value]
         except:
-            raise RuntimeError("Cannot patch comfyui as it is not up to date")
+            raise RuntimeError("ComfyUI was probably updated with breaking changes. "
+                               "If A1111, ComfyUI and sd-webui-comfyui are up to date, "
+                               "please notify the authors of sd-webui-comfyui.")
 
 
 def generate_prompt_server_add_routes_code_patch(custom_scripts_path):