Looking for logging into the Salesforce Lightning Open Screen Not Working 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 Salesforce Lightning Open Screen Not Working site. After that you can login as usual with your login credentials.
https://developer.salesforce.com/forums/?id=9060G000000MRVtQAO
https://success.salesforce.com/answers?id=9063A0000019TjMQAU
https://success.salesforce.com/issues_view?id=a1p3A0000018BKXQA2
https://success.salesforce.com/issues_index?tag=Lightning
https://help.salesforce.com/apex/HTViewSolution?urlname=Salesforce1-Troubleshooting-Login-Issues&language=en_US
https://help.salesforce.com/apex/HTViewHelpDoc?id=lex_switching_considerations.htm
https://help.salesforce.com/HTViewSolution?id=000170753
https://success.salesforce.com/ideaView?id=0873A000000lDMlQAM
https://help.salesforce.com/articleView?id=getstart_login.htm&type=5
https://success.salesforce.com/issues_index?page=19&tag=Mobile
https://success.salesforce.com/ideaView?id=08730000000CIt7AAG
https://success.salesforce.com/issues_view?id=a1p3A0000001CiWQAU&title=login-as-user-in-lightning-with-lock-session-to-domain-invalidate-session-quickly
https://success.salesforce.com/issues_index?page=2&tag=Lightning