Compile error with XCode 14.3.1 on Ventura 13.5

[edoloughlin]

I cloned the repo, installed XCode 14.3.1 (I'm not an active macOS/iOS dev), ran it to accept terms and install any dependencies.
When I run ./makelocal.sh it stops with a compile error:

In file included from /Users/me/dev/external/Autumn/Autumn/Core/ObservedEvent.m:6:
/Users/edoloughlin/dev/external/Autumn/Autumn/Core/ObservedEvent.h:13:62: error: expected a type
- (instancetype) initWithEvent:(CFStringRef)event ofElement:(AXUIElementRef)element;
                                                             ^