[Observium] LDAP Debug Support

Can anyone point me in the right direction for debugging LDAP authentication? Running the most current stable release of the Professional edition currently on CentOS 7 (in our test environment). Upgraded PHP to 7.1, as the older PHP we had installed was not working, now I cannot log in. It just loops me back to the main page. I was also getting TLS negotiation errors (with a blank error message) though I seem to have solved that particular issue for now. I can't seem to figure out how to enable debug logging though so that I can find out what's going on...