Syntax error on line 1 of /etc/httpd/conf.d/auth_vas4.conf: Cannot load /usr/lib64/httpd/modules/mod_auth_vas4.so into server: /usr/lib64/httpd/modules/mod_auth_vas4.so: undefined symbol: vassym_krb5_get_error_name
Authentication Services 4.2.0 does not support integration with any third-party applications using GSSAPI. mod_auth_vas (MAV) makes use of GSSAPI. GSSAPI support was fixed in Authentication Services 184.108.40.20603 and subsequent releases.release.
To download the latest QAS version go to https://support.oneidentity.com/authentication-services/download-new-releases
The MAV version that you need to install with QAS 4.2.1 and up is MAV version 220.127.116.11 which can be downloaded here: https://github.com/OneIdentity/mod_auth_vas/releases/tag/18.104.22.168
For How-To, Installing and Configuring and Troubleshooting MAV please go the following link: