This error means that it is not implemented. There is no need to make a list for the following reasons:
other users already made lists
such a list can be simply auto generated by the developers
a list will basically be ignored by the developers, because development time is focused on websites that are going to be used (which is not apparent from a list) 🡲 therefore a user has to create an issue for each website he wants to access, so the developer can see that a broken website is in need
e-Hentai luscious doujins hentaifox nhentai
all give the same message
there are more, making a list