diff --git a/execution.py b/execution.py
index fcb4f6f40..41686888f 100644
--- a/execution.py
+++ b/execution.py
@@ -775,7 +775,7 @@ def validate_prompt(prompt):
                 "details": f"Node ID '#{x}'",
                 "extra_info": {}
             }
-            return (False, error, [], [])
+            return (False, error, [], {})
 
         class_type = prompt[x]['class_type']
         class_ = nodes.NODE_CLASS_MAPPINGS.get(class_type, None)
@@ -786,7 +786,7 @@ def validate_prompt(prompt):
                 "details": f"Node ID '#{x}'",
                 "extra_info": {}
             }
-            return (False, error, [], [])
+            return (False, error, [], {})
 
         if hasattr(class_, 'OUTPUT_NODE') and class_.OUTPUT_NODE is True:
             outputs.add(x)
@@ -798,7 +798,7 @@ def validate_prompt(prompt):
             "details": "",
             "extra_info": {}
         }
-        return (False, error, [], [])
+        return (False, error, [], {})
 
     good_outputs = set()
     errors = []
diff --git a/server.py b/server.py
index 76a99167d..95092d595 100644
--- a/server.py
+++ b/server.py
@@ -657,7 +657,13 @@ class PromptServer():
                     logging.warning("invalid prompt: {}".format(valid[1]))
                     return web.json_response({"error": valid[1], "node_errors": valid[3]}, status=400)
             else:
-                return web.json_response({"error": "no prompt", "node_errors": []}, status=400)
+                error = {
+                    "type": "no_prompt",
+                    "message": "No prompt provided",
+                    "details": "No prompt provided",
+                    "extra_info": {}
+                }
+                return web.json_response({"error": error, "node_errors": {}}, status=400)
 
         @routes.post("/queue")
         async def post_queue(request):