Hey we're aware of this - I'm working on a temporary fix that's hotfixable that'll make this wall buildable until we can do a proper fix.
This thread was added on April 11, 2023, with posts from JagexSponge.
Yo, the thing has went back to an unaccessable location...
Cheers I've let the Grove team know - looks like a bad merge of files after Unwelcome was released - They're aware and will sort!