Unable to set default permissions

[HarbourHeading]

Hello,

I have been trying to setup pvptoggle on my server, but the players on my server are unable to use it.
Luckperms is the permissions plugin I use and I have tried setting:
-pvptoggle.allow
-pvptoggle.others
-pvptoggle.others.set

But none of these have made it work, it still says "no permission".
Any reason behind this?
I have not mistyped anything, nor is it the wrong group.
Not sure what the issue is, but some help would be good.
Thanks in advance.