Unable to spawn entity with summon command
I've been trying to make an adventure map, but I can't summon the boss, because it keeps saying "Unable to summon object".
Here's the command I'm using:
summon minecraft:zombie ~ ~1 ~ {CustomName:"Uncle",Health:100.0f,HandItems:[{Count:1,id:diamond_sword}, {Count:1,id:shield}],UUIDLeast:-6645587150281567948L,UUIDMost:4420078606457655279L}
Solution 1:
Your problem is probably your CustomName. Since 1.13, the name must be enclosed with quotations followed by a backslash, without removing the original quotations.
An example:
summon aquid ~ ~ ~ {CustomName:"\"Zoidberg\""}
Your original command with those changes looks like this:
summon minecraft:zombie ~ ~1 ~ {CustomName:"\"Uncle\"",Health:100.0f,HandItems:[{Count:1,id:diamond_sword}, {Count:1,id:shield}],UUIDLeast:-6645587150281567948L,UUIDMost:4420078606457655279L}