You can't summon a WitherSkull and in the chat saying
"Unable to summon an object"
sorry my english is bad
Environment
Put your operating system (Windows 7, Windows XP, OSX) and Java version if you know it here
Linked issues
duplicates 1
Comments 4
Fixed for a future version. MC-68740
Fixed for a future version. MC-68740
I came here to see if this happens to other people and it is obviously.