add exception message

main.py

@@ -115,7 +115,7 @@ async def make_anchor_video_v2(req:request):
         if re.search('[a-zA-Z]', txt) !=None:
             return {'msg':'輸入字串不能包含英文字!'}
     
-    for imgu in image_urls:
+    for imgu in req.image_urls:
         try:
             if get_url_type(imgu) =='video/mp4':
                 r=requests.get(imgu)