https://mclo.gs/LAdUsVj

and crash the server.

Not sure what happened here. Looks like your data file is corrupted or something. I would recommend deleting the hiddennames.json file in the hiddennames folder in the world save

its almost like a bug from fakename, if i set fakename with colors, it changes the & and § to �.

Hmm, I will look into this

any uipdate?

I am very confused. Why would you have Hiddennames and Fakename? They do about the same thing