Looking for logging into the Null 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 Null site. After that you can login as usual with your login credentials.
https://null.co.in/users/sign_in
http://mail.orgchm.bas.bg/
https://meta.discourse.org/t/null-login-bug-last-couple-betas/99428
https://en.wikipedia.org/wiki/Null_session
https://www.youtube.com/watch?v=cHpqYcrNRRM
https://stackoverflow.com/questions/29493194/volley-login-error-null
https://books.google.com.tr/books?id=_NJ3ZhYcQcMC&pg=PA89&lpg=PA89&dq=null+login
https://www.sqlservercentral.com/Forums/Topic1131-5-1.aspx
https://books.google.com.tr/books?id=Vf2_DgAAQBAJ&pg=PA131&lpg=PA131&dq=null+login
https://support.microsoft.com/en-us/help/2633011/sbs-2011-login-to-rwa-fails-with-error-the-domain-is-null-or-empty
https://support.microsoft.com/tr-tr/help/307002/prb-asp-odbc-sql-server-error-0x80040e4d-login-failed-for-user-null
http://skaion.com/cu/api/NullLoginManager.html
https://www.ibm.com/support/docview.wss?uid=swg1PI85517