fix more

app.py

@@ -58,7 +58,7 @@ def infer(prompt: str, negative: str, width: int, height: int, sampler: str, ste
     if torch.cuda.is_available():
         generator = torch.Generator(device="cuda").manual_seed(seed)
     else:
-        generator = torch.manual_seed(seed)
+        generator = None
     if sampler == "EulerDiscrete":
         pipe.scheduler = EulerDiscreteScheduler.from_config(pipe.scheduler.config)
     elif sampler == "EulerAncestralDiscrete":