how to fix this?

[smorfo]

I'm making a server and have installed essentials, essentials chat all the proper stuff to make the chat a little cleaner I tried removing op color nick prefix & the < > on {DISPLAYNAME} I clicked save and it hasn't worked I refreshed and looked back into my essentials folder and these have popped up (one new one each time I try)

[_Tarna_]

Make sure you aren't messing up the formatting on the config.yml. You can put it in like an online yml parser to make sure everything is correct with no errors.