Server Error 500 after OCS installation

Hi, I get server error 500 after OCS installation (via softaculous), this appears on admin page as well.
Technical details:

Software Open Conference Systems
Installation Number 388_90903
Version 2.3.6.0
Installation Time December 31, 2017, 11:46 pm
Path /home/vol11_1/epizy.com/epiz_21120262/htdocs//ocs
URL http://cjs.rf.gd/ocs
Admin URL http://cjs.rf.gd/ocs/index.php/index/index/login
Data Directory /home/vol11_1/epizy.com/epiz_21120262/ocsdata
Database Name epiz_21120262_724
Database User 21120262_5
Database Host sql210.byetcluster.com

I can provide database password upon request.

Thank you in advance.