After installing opencv3.4 Centos 7 not rebooting in GUI

I was already using OpenCV 2.4.5 by installing it using yum install opencv opencv-devel. But I was facing some problems as it doesn't have FFmpeg. I installed OpenCV 3.4 following this guide . After following these steps I followed guide to link share lib , and I created opencv.conf file at

/etc/ld.so.conf.d/opencv.conf

and wrote the path of my libs to it that is

/usr/local/installation/opencv3.4/lib64

Then I ran

sudo ldconfig -v

It was all working fine after that and I could successfully build QT projects using new OpenCV libs. But once I restarted my CentOS7 I got the "Oh no! Something has gone wrong" screen. I have to install it in a system but for now, I was doing it all on Oracle VirtualBox as I can't risk it on main system. I am able to login using Ctrl+Alt+F1. What could be the possible problem?