Required Moodle,mysql freelancer for Moodle 3.1 database issue: check_mysql_file_format Error job

We need to track down the source of a possible mysql issue. Moodle reports:

check_mysql_file_format Error reading environment data (14)[[unsupporteddbfileformat]]

on environment check with current version of moodle.

We are running in on old environment and cannot upgrade until we determince the nature of this issue.

Moodle 3.1.3+
mySQL 5.6
php 5.6
Cloudlinux 6.1

we are seeking a moodle dB expert who can troubleshoot and offer explanation or solution. Please only high level moodle dB experts apply.

thanks.

Skills & Expertise Required

Moodle mysql