Strange "Print Name" tool in everybody's hotbar

On my server, everyone has this strange weapon, no image or anything, called “PRINT NAME”
I have no clue whats wrong, there’s nothing in console.
Help would be great!

What gamemode? What addons do you have installed? Have you tried running a vanilla version of the gamemode?

Ok, I got it xD
All the issues left were due to an interfering addon