I'm having the issue reported on this thread. I realize the thread is old and I'm new to using threads so I'm not sure if this will reach anyone. I cannot add some layers online in ArcMap. Some of the layers will add just fine (imagery, PLSS), however when I try to add the United States boundaries for example I get the error "cannot read package contents". Is there any advice in addition to what's been advised through this thread that may help me? This is not a one time occurrence, it appears to be happening every time I try to add these layers.