Getting error when login

Hi,

I’m trying your plugin, to use SimpleSAMLphp method for login, I’m already follow your all of your instruction, but when back to login it always get “An unexpected error occured when logging in.”

Without any error information in debug mode.

Is there any clue why that happen?

Active:
– Redirect wordpress login page (work)
– Enable Single Logout

The page I need help with: [log in to see the link]