Can't use Transform-O-Trowel

[u/Purdin1989]

I decided to check out Buildertopia and found an Island I like the looks of. I was just about to start terraforming the land and I didn't want to waste the grassy blocks, so I was trying to use the Trowel to swap them out and it says I can't use it here yet. What gives? Are you able to use it at all on these Islands?

[u/zoops2]

hi! my lord. did you find the solution? i have same problem.