django 在if语句中判断之后return render报错

def video(request):
    target = "http://api.pingcc.cn/?"
    genre_list = ["韩国剧", "海外剧",  "欧美剧 ",  "国产剧 "]
    get_url = request.GET.get('ysurl')
    get_genre = requests.GET.get('genre')
    url = target + "ysurl=" + get_url
    req = requests.get(url)
    jsons = req.json()
    list = jsons.get('list')
    connect = {
        'message':list,
    }
    if get_genre in genre_list:
        return render(request,'api/series_list.html',connect)
    else:
        return render(request,'api/video.html',connect)

The view f_info.views.index didn't return an HttpResponse object. It returned None instead.我在使用django的时候碰见了这个报错，但是我的return 那里是没错的，换成return httpresponse也是对的，会显示，所以我可能是html页面有问题，但是我不知道该如何解决，想问大佬碰见过这个问题吗，如何解决呢？