我正在使用 debain jessie,certbot 版本 0.9.3-1~bpo8+2。从最近两天开始,我在为我的网站续订证书时开始收到此错误。
Could not bind TCP port 443 because it is already in use by another process on
this system (such as a web server). Please stop the program in question and then
try again.
-------------------------------------------------------------------------------
Attempting to renew cert from /etc/letsencrypt/renewal/www.testsite.com.conf produced an unexpected error: object of type 'NoneType' has no len(). Skipping.
我应该怎么办 ?我对 Letsencrypt 不太熟悉。有人请遮光吗?