It seems to dispatch datapack functions as commands. Every time i startup the server, a different part of my datapack causes a Nullpointer Exception, when it checks for 

org.bukkit.craftbukkit.v1_16_R1.command.VanillaCommandWrapper.getPermission(VanillaCommandWrapper.java:90) ~[patched_1.16.1.jar:git-Paper-10]

I did put the Paper logs here, because I have more of those, but I also tested it with Spigot barely. So it's coming from Spigot.

I attached and example of my datapack file. It works flawless on 1.15.2, also it happens to many different parts, while they sometimes just call 1 tp command.