MDT not loading

[TrueSunnyD]

Hows it going, I'm still pretty new to coding but when I tried opening the MDT after making the files it came up with this error code:
SCRIPT ERROR: @mdt/sv_mdt.lua:32: attempt to index a nil value (global 'MySQL')
Access denied for command add_principal.
server thread hitch warning: timer interval of 450 milliseconds
SCRIPT ERROR: @mdt/sv_mdt.lua:9: attempt to index a nil value (global 'ESX')

any idea how to fix that issue?