Relevant link: https://github.com/wodxgod/Griefing-Methods/blob/master/Exploitation/Database%20Dumping/LiteBans.md LiteBans has removed the sqlexec command as of [version 2.5](https://www.spigotmc.org/resources/litebans.3715/update?update=332314), and as such this is no longer possible.
Relevant link: https://github.com/wodxgod/Griefing-Methods/blob/master/Exploitation/Database%20Dumping/LiteBans.md
LiteBans has removed the sqlexec command as of version 2.5, and as such this is no longer possible.