Bug: Cannot create a new user when SAML and ABLC rule is enabled

[skomma]

Environment

Host

item	version
GROWI	6.2.x ~

How to reproduce? (再現手順)

1. Enable SAML and ABLC rule
2. Login with SAML
   • The login user to be used must not satisfy ABLC rules.

What happens? (症状)

• /passport/saml/callback endpoint doesn't respond anything
  • When this situation occurs, no error message has been output

What is the expected result? (期待される動作)

• /passport/saml/callback endpoint responds valid content.

[hiromu-ta]

対応ストーリー：https://redmine.weseek.co.jp/issues/144138