Looking for logging into the Cockatrice Unknown Error site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Cockatrice Unknown Error site. After that you can login as usual with your login credentials.
https://www.reddit.com/r/Cockatrice/comments/3m0li3/error_unknown_login_error_1/
https://github.com/Cockatrice/Cockatrice/issues/1586
https://github.com/Cockatrice/Cockatrice/issues/2238
https://github.com/Cockatrice/Cockatrice/issues/2231
https://github.com/Cockatrice/Cockatrice/issues/1561
https://github.com/Cockatrice/Cockatrice/issues/1559
https://github.com/Cockatrice/Cockatrice/wiki/Troubleshooting
https://github.com/Cockatrice/Cockatrice/issues/1406
https://github.com/Cockatrice/Cockatrice/issues/1842
https://github.com/Cockatrice/Cockatrice/issues/1568
https://github.com/Cockatrice/Cockatrice/issues/1633
https://gitter.im/Cockatrice/Cockatrice/archives/2015/10/13
https://tappedout.net/mtg-forum/online-magic/why-cant-i-connect-to-cockatrice/