World server is Down

Hello,

i hope this issue hasn`t been discussed yet and if yes i am sorry to bring it up again. I have an issue with entering the world of world of warcraft, that is when i select my character and press enter world, the bar loads and the it brings me back to the character selection screen with the error : World server is down. I would like to mention that before this happened i was playing a priest and while i was at the trainer in exodar and looking at the lvl 14 spells that i will learn, me being 12, i clicked on Psychic Scream and it sent me to the character selection screen with the same error. I would like to also mention that this happens with all other characters as well. Thank you!