Why can't my friends see the whispers I send them

My friends can’t see my whispers。
Did the system administrator disable my chat function?
Maybe I sent a private letter to some strangers the day before yesterday to invite them to join the guild, but I promise that this will never happen again. I hope to remove my restrictions, which has caused great inconvenience to my normal games. I hope to remove them as soon as possible! thank!
my ID is Darktime

Apparenly a bunch of us were shadowmuted with no idea as to how long