Greetings,
We are still trying to get an install that is fully functional. Tried going with 12.6.0 this time, and now different issues. Wish I knew what we doing wrong that we can't get this to work fully. Previously struggling with 12.5.0. Completely wiped clean before starting install with 12.6.0.

Latest problems with 12.6.0:
The server has a ton of errors in the KMC.

Logging in to KAC, then Choosing the publisher > Actions >Manage
The KMC loads, but I get a popup stating: “Error: Internal Server error occurred”. I have to click the OK button twice, then can use the page. This is the Dashboard. If I refresh the dashboard page, that error popup recurs consistently. Across browsers, and operating systems.
Accessing with my laptop, running OpenSuse LEAP 42.2 and Chromium (and Firefox). I can access the KAC and KMC, (though with the error). But others are getting the "white blank page" issue with Mac OS / Safari, and Windows 10.

The logs are cranking out an overwhelming amount of information in kaltura_api_v3.log I don’t dare paste it, it cranks out thousands of lines.

Server setup information:
Single server setup (everything on one server).
CentOS 7.3.11.1611 (Core).
Following these directions: https://github.com/kaltura/platform-install-packages/blob/master/doc/install-kaltura-redhat-based.md

When run this step:

/opt/kaltura/bin/kaltura-mysql-settings.sh

package mysql-server is not installed
mariadb-server-5.5.52-1.el7.x86_64
Redirecting to /bin/systemctl restart mariadb.service

And it looks like nothing is setup due to that error?

rpm -qa | grep maria

mariadb-5.5.52-1.el7.x86_64
mariadb-server-5.5.52-1.el7.x86_64
mariadb-libs-5.5.52-1.el7.x86_64

rpm -qa | grep my

php-mysql-5.4.16-42.el7.x86_64

Suggestions?
Thanks!