what happend with my facebook??

i do not know what happend with my facebook , sometimes my profile can not be opened with my friends, anyone can help me?

this is my profile,,using my bestfriends account,

and this is profile my bestfriend,,

look her siblings,,,i was there :0

but i can't open her profile,,,

i don't know why???

ohh sadly..

all my friends complain to me,,,

and i can only say,,i don't know why?