Gravity database unable to be created

Help
1

Expected Behaviour:

Trying to install PiHole. Using Lepotato and Raspbian.

Actual Behaviour:

When I try to install PiHole, it runs until eventually giving me this error:
"pihole-FTL: /lib/arm-linux-gnueabihf/libc.so.6: version `GLIBC_2.28' not found (required by pihole-FTL)
[✗] Unable to create /etc/pihole/gravity.db
[✗] Error creating new gravity database. Please contact support.
[✗] Unable to migrate to database. Please contact support."

Debug Token:

https://tricorder.pi-hole.net/4MECB0OU/

2

Your Operating System is not supported.

The debug log is showing the issue:

*** [ DIAGNOSING ]: Operating system
[✓] Distro:  Raspbian
[✗] Version: 9
(...)
[✗] Error: Raspbian is supported but version 9 is currently unsupported

If you are using Raspbian 9 you won't be able to install Pi-hole (this OS uses an older GLIBC and there is no way to update this library).

You need a supported OS.

Reference: