Web2Cit assumes that websites are reached through https. However, this assumption may not always work. For example, webpages from http://archivo.lavoz.com.ar/ cannot be translated because the web server does not respond to https requests.
Possibly related to T315020
Another example found by @Nidiah: http://autobus.cyclingnews.com/news.php?id=news/2009/may09/may01news2
Another example found by @Nidiah: http://autobus.cyclingnews.com/news.php?id=news/2009/may09/may01news2
Note that in that example and in this one (also found by @Nidiah) the error does not seem to be because the server does not respond to https requests, but rather because the certificates are invalid.
Another example: http://www.gamelook.com.cn/2025/09/579639/
Citoid works, but Web2Cit cannot parse the webpage.