i get an error when i right click with an object. like a block, or worldedit wand

hi. i get this error when i try to set a 2nd position with a worldedit wand or use a kit selector and other stuff. here is a screenshot:

i am playing on optifine 1.15.2 and i have PaperMC as software.

i think so, actually, since i changed my software from spigot to paper, i dont remember it doing it.

it only shows the error when i used spigot if im correct. when i switched to paper, i dont remember it showing the error.

Quote from VlablaMC

it only shows the error when i used spigot if im correct. when i switched to paper, i dont remember it showing the error.

nevermind, it is showing the error right now while i am using a worldedit brush.