When you type a command with block names, such as: "/fill ~ ~ ~ ~100 ~100 ~100 minecraft:air replace minecraft:stone" It says "`replace` is not a state for block minecraft:air"
(That means that the parser can't distinguish block state and command syntax.)
Comments 3
Oops, didn't realized that the block state is a number. I thought it was the new "facing=..." thing. Can moderator please delete this issue?
Add the blockstate/datavalue between air and replace.
It's not a phrasing error, but a error in your usage.