enable mod_ssl in centos 7 login blank page

Hello,

I'm not so good in working with linux.

I studied the dokumentation for deploying Packages.

I enabled Mod_ssl with this Tutorial: https://www.codeflow.site/de/article/how-to-create-an-ssl-certificate-on-apache-for-centos-7

OCS Server 2.7, everything works fine before enabling ssl

Then i want to login ocsreports. After login there is a blank page.

Thanks for your help

SC