Guild Wars 2

I just joined a guild this evening.

I cannot speak in /guild and I cannot read what’s going on too.
When I try to speak, my message just goes away but never reach the channel (I ask a guild member in /w and he said he wasn’t able to read what I wrote). I also cannot read what they are saying in /guild.

I tried to :
- go invisible / online
- log off / log in
- restarted my computer

I’m having this problem as well, although when I try to speak in guild chat in any of my guilds I get the message “You are not in a guild”. I tried logging out and back in, as well as restarting my computer.