In the login form, if you get the session expired error, the text
Session expired! Check here
for more information
appears, where “here” is a link. But the color of the link is white, while the background of that text is also white, so the link is effectively invisible.
(I don’t have an issue with logging in, I refreshed and was able to log in, I just want to report that that link is invisible if you do get the error)