/kill not working for OPs

I have a Paper 1.16.5 server and whenever my admins (OPs) do /kill, it says they don’t have access to that command.

I thought OPs had access to ALL commands?
Please help

Plugin List (if you need it)

OPs have levels and even at level 4 at times won’t have all permissions depending on how plugins are handling it. In this case essentials would be overwriting /kill, so you’d need to give essentials.kill as a permission through your permission plugin, or give op level 2 and use /minecraft:kill