fix #1737: MakeFastAPIOffline函数内代码编写错误

server/utils.py

@@ -194,7 +194,7 @@ def remove_route(url: str) -> None:
                 index = i
                 break
         if isinstance(index, int):
-            app.routes.pop(i)
+            app.routes.pop(index)
 
     # Set up static file mount
     app.mount(