When "Firstname field from IdP" and "Lastname field from IdP" are left empty (they are not mandatory and configuration saves without errors when they're empty), a login page, after successful login, shows an error page saying that index are not defined in lines 150 and 151 of auth.php
When "Firstname field from IdP" and "Lastname field from IdP" are left empty (they are not mandatory and configuration saves without errors when they're empty), a login page, after successful login, shows an error page saying that index are not defined in lines 150 and 151 of auth.php