fixed error

app.py

@@ -71,8 +71,8 @@ def inference(
     if prompt is None or prompt == "":
         raise gr.Error("Prompt is required")
 
-    if qrcode_image is None and qr_code_content == "":
-        raise gr.Error("QR Code Image or QR Code Content is required")
+    if qr_code_content == "":
+        raise gr.Error("QR Code Content is required")
 
     pipe.scheduler = SAMPLER_MAP[sampler](pipe.scheduler.config)