How do I reset all skill levels back to zero

type zl.reset true

or zl.lvl * * 0 but just use the above.

I know old post, but how do I do this automatically after a wipe ?

you must use the above commands after a wipe

you can use Wipe Data OnNewSave before a wipe but the plugin must be loaded before you wipe

To bring this back up I have wiped my server twice now with Wipe Data OnNewSave : True and it is still not reseting the data.  Is there something else I could be missing?

if OnNewSave hook is not called then it will not work. your server must create a NEW save file for this hook to be called.
zlevelsremastered.nowipes permission will not wipe anyone or group that has this permission
if the plugin is not loaded it will not wipe
if the option is not enabled then it will not wipe

there is no other reason

It must be something with the OnNewSave hook not being called because it isnt only this mod that I am having this problem with.  Is there a way to verify if this was called on a new map?

this message would be shown in the console during server startup (before server startup is complete)

New save detected...

you can use the above command to reset everything too