When trying to place the button with /cleanupbags I get this error message:
This only happens when Luna UF is enabled, so a workaround is just to disable Luna, place the button and then re-enable it afterwards.
shirsig commented
That's a bug in luna (and been fixed for a while afaik)
OskarOskar commented
Oh whoops you're right, I updated to the newest Luna version and that fixed it.