this is normal behaviour and hopefully upgrade script mode has completed by now.

the last phase of patching a SQL2008+ cluster node is to fail over to the node, at that point SQL comes up and completes the patch by going into script upgrade mode, no one is allowed to log on until this completes. How long this takes will vary depending on how many databases are on the server and anything that affects the speed of the server. Would normally complete in a few minutes.

If you look at the SQL errorlog through notepad you will see SQL running scripts against the databases. When you see the message 'recovery is complete' you will be able to log on.