I'm not the OP of this, however a number of permissions are broken for me as well. I'm using spongeforge 1.16.5-36.2.5-8.1.0-RC1153. Luckperms version 5.4.0. Server doesn't register Pixelmon as a valid plugin, and so a lot of the permissions get reallocated to either minecraft or unknown prefix.
Pastebin of errors:
https://pastebin.com/QZaG8xXDI am apart of the group with the permissions, but the checkspawns fails. I've tried giving the minecraft.command.checkspawns which is where that permission was reallocated but it spits out "must be OP or have permission to use this command".
Images of changed prefix, permissions assigned normally, command checkspawns failing, new permission also failing:
https://imgur.com/a/KXK7eNP