Commented out the process to find the root cause

app.py

@@ -81,6 +81,20 @@ def generate_video_gpu(
     guidance_scale,
     flow_shift,
     embedded_guidance_scale
+):
+    return None
+
+@spaces.GPU(duration=120)
+def generate_video_gpu2(
+    model,
+    prompt,
+    resolution,
+    video_length,
+    seed,
+    num_inference_steps,
+    guidance_scale,
+    flow_shift,
+    embedded_guidance_scale
 ):
     print("generate_video_gpu (prompt: " + prompt + ")")
     if torch.cuda.device_count() == 0: