Django allauth Sendgrid django错误IncompleteRead已读取0个字节，预计还会有116个

如何解决Django allauth Sendgrid django错误IncompleteRead已读取0个字节，预计还会有116个

我正在使用Django allauth在发送电子邮件后验证用户，但是我不断收到错误消息：

IncompleteRead(0 bytes read,116 more expected)

当前，我对注册视图的看法是在发布请求后进行处理的：

if request.method == 'POST':
    form = SignUpForm(request.POST)
    if form.is_valid():
        storage = messages.get_messages(request)
        for _ in storage:
            pass
        for _ in list(storage._loaded_messages):
            del storage._loaded_messages[0]
        user = form.save(commit=False)  
        #user.is_active = False
        user.save()
        send_email_confirmation(request,user,True)
        return redirect('main:user_login')

我的Sendgrid设置为：

SENDGRID_API_KEY = 'myaapikey'
EMAIL_HOST = 'smtp.sendgrid.net'
EMAIL_PORT = 587
EMAIL_USE_TLS = True
EMAIL_HOST_USER = 'my username'
EMAIL_HOST_PASSWORD = 'mypassword'
DEFAULT_FROM_EMAIL = DEFAULT_EMAIL

我的allauth是：

AUTH_USER_MODEL = 'main.Profile'
ACCOUNT_EMAIL_VERIFICATION='mandatory'
ACCOUNT_UNIQUE_EMAIL = True
ACCOUNT_EMAIL_required=  True
ACCOUNT_AUTHENTICATION_METHOD = 'email'
ACCOUNT_LOGIN_ON_EMAIL_CONFIRMATION = False
ACCOUNT_EMAIL_SUBJECT_PREFIX = "JoinCampus "
SOCIALACCOUNT_ADAPTER = 'main.adapters.socialAccountAdapter'

当我使用Django Email后端时，正在发送电子邮件，但是当我使用Sendgrid时，它不起作用。但是，如果我使用sg = SendGridapiclient(os.environ.get('SENDGRID_API_KEY'))，则电子邮件发送成功。