If you encountered an issue like the one above:

There were some errors in installing package.

First check logs on location :

/usr/local/emps/var/log/php-fpm.log

If you see something like this :

"failure: repodata/repomd.xml from bintray--ookla-rhel: [Errno 256] No more mirrors to try."
"https://ookla.bintray.com/rhel/repodata/repomd.xml: [Errno 14] HTTPS Error 403 - Forbidden"

Use yum config manager to disable this repository that is used by default :

yum-config-manager --disable bintray--ookla-rhel

Try again to install the required app , enjoy !