diff --git a/comfy/model_downloader.py b/comfy/model_downloader.py
index 7e9c66308..81f9afe80 100644
--- a/comfy/model_downloader.py
+++ b/comfy/model_downloader.py
@@ -33,7 +33,7 @@ def get_or_download(folder_name: str, filename: str, known_files: List[HuggingFi
             destination = folder_paths.get_folder_paths(folder_name)[0]
             known_file: Optional[HuggingFile | CivitFile] = None
             for candidate in known_files:
-                if candidate.filename == filename or filename in candidate.alternate_filenames or filename == candidate.save_with_filename:
+                if str(candidate) == filename or candidate.filename == filename or filename in candidate.alternate_filenames or filename == candidate.save_with_filename:
                     known_file = candidate
                     break
             if known_file is None:
diff --git a/comfy/utils.py b/comfy/utils.py
index ab41799e3..98f3f602f 100644
--- a/comfy/utils.py
+++ b/comfy/utils.py
@@ -24,6 +24,8 @@ PROGRESS_BAR_HOOK = None
 def load_torch_file(ckpt, safe_load=False, device=None):
     if device is None:
         device = torch.device("cpu")
+    if ckpt is None:
+        raise FileNotFoundError("the checkpoint was not found")
     if ckpt.lower().endswith(".safetensors"):
         sd = safetensors.torch.load_file(ckpt, device=device.type)
     else: