Problem mit Kerberos unter Apache

ktpass -princ HTTP/sub.domain.com@INTERN.LOCAL -mapuser kerb@intern.local -pass P@55w0rd -crypto ALL -ptype KRB5_NT_PRINCIPAL -out C:\temp\kerbkey.keytab

[libdefaults]
        default_realm = INTERN.LOCAL

        kdc_timesync = 1
        ccache_type = 4
        forwardable = true
        proxiable = true

[realms]
        INTERN.LOCAL = {
                kdc = dc01.intern.local
                admin_server = dc01.intern.local
                default_domain = intern.local
       }
[domain_realm]
        .sub.domain.com = INTERN.LOCAL
        sub.domain.com = INTERN.LOCAL
        intern.local = INTERN.LOCAL
        .intern.local = INTERN.LOCAL

<VirtualHost *:443>
    ServerName sub.domain.com
    ServerAdmin it-administration@domain.com
    DocumentRoot /var/www/page

    <Directory /var/www/page>
     AllowOverride All
    </Directory>

    SSLEngine on
    SSLCertificateFile /etc/apache2/ssl/wildcart-zert.crt
    SSLCertificateKeyFile /etc/apache2/ssl/wildcart-key.key

<IfModule !mod_auth_gssapi.c>
    LoadModule auth_kerb_module /usr/lib/apache2/modules/mod_auth_gssapi.so
</IfModule>

LimitRequestFieldSize 32768
  <Location "/">  
 AuthName kerb@INTERN.LOCAL
 AuthType GSSAPI
 GssapiBasicAuth On
 GssapiCredStore keytab:/etc/apache2/krb5/kerbkey.keytab
 Require valid-user
  </Location>

    ErrorLog ${APACHE_LOG_DIR}/page-ssl_error.log
    CustomLog ${APACHE_LOG_DIR}/page-ssl_access.log combined
</VirtualHost>

Unauthorized
This server could not verify that you are authorized to access the document requested. Either you supplied the wrong credentials (e.g., bad password), or your browser doesn't understand how to supply the credentials required.  

Apache/2.4.41 (Ubuntu) Server at sub.domain.com Port 443