For the past few days, we have had some issues with our SSO. A few users a day will get the sign in screen with the error "Sign In Error: An unknow JAS sign in error occurred. Please contact the System Administrator". They are not getting this after a sign off but on their initial sign in. I have not noticed any issues on the server that SSO is installed on. The user is able to sign in with SSO by closing Internet Explorer and reopening it. Any suggestions on how to fix this?