My "Call to arms" bg is bugged

Hey, i'm a lvl 38 player from Lordaeron. I noticed that my PVP features don't work properly i think, when i open the battleground window i can't use "Join Battle" on "Call to Arms" bg, the button is clickable but nothing happens. It works fine though with Warsong Gulch and Arathi Basin. Did my character bugged? Thx

That happens when the call to arms battleground of the day is not accessible to you because of your level.