Cant place signs even whith out permissions plugins

[Nfvckmb]

I have just created a new Nukkit server for the first time and it's not allowing me to place signs, even with permission plugins (LuckPerms) removed. I'm not sure if it's a bug or I'm just a big idiot.

 

[PetteriM1]

I have just created a new Nukkit server for the first time and it's not allowing me to place signs, even with permission plugins (LuckPerms) removed. I'm not sure if it's a bug or I'm just a big idiot.

Only oak signs can be placed on Nukkit due to world format limitations