SimpleSAMLphp 2.0.x has been released and has some API changes that break (WSOD) Drupal if SimpleSAMLphp_auth module enabled and activated.
This is the error you via drush and after disabling SimpleSAMLphp_auth
Error: Class 'SimpleSAML_Configuration' not found in _simplesaml_auth_autoload() (line 150 of /
/sites/all/modules/contrib/simplesamlphp_auth/simplesamlphp_auth.module).
Enable the simplesamlphp_auth module and then click "Activate authentication via SimpleSAMLphp"
I've verified that I have a working SimpleSAMLphp configuration and valid sp-default (w/ADFS).
Active
3.0
Code
FYI, these changes from the backdrop version of simplesamlphp_auth did the trick for me https://github.com/backdrop-contrib/simplesamlphp_auth/pull/20/files
I applied the changes suggested in the comment #2 and I can attest that worked for me.
Thanks !
Yes comment #2 works - I have made a patch against 7.x-3.x-dev.