Update app.py

app.py

@@ -45,7 +45,6 @@ if torch.cuda.is_available():
     
     if PREVIEW_IMAGES:
         previewer = Previewer()
-        previewer.load_state_dict(torch.load("previewer/previewer_v1_100k.pt")["state_dict"])
 
         def callback_prior(i, t, latents):
             output = previewer(latents)
@@ -98,6 +97,8 @@ def generate(
     )
 
     if PREVIEW_IMAGES:
+        previewer.load_state_dict(torch.load("previewer/previewer_v1_100k.pt")["state_dict"])
+
         for _ in range(len(DEFAULT_STAGE_C_TIMESTEPS)):
             r = next(prior_output)
             if isinstance(r, list):