If you build from SDK it’s fine. It’s plays fine. The sdk (.pro) includes steps for copying files that probably require the sdk.
I’ll post a ticket in the original repo and add to https://forum.sailfishos.org/t/apps-that-havent-been-ported-to-aarch64 (which is a wiki)
EDIT: added a ticket and to the page. I think the files copy stuff I suggested is:
copydata.commands = $(COPY_DIR) $$PWD/data/lpbuild /home/deploy/installroot/usr/share/harbour-machines-vs-machines-sfos/data/
target.depends = $(target) copydata
export(first.depends)
export(copydata.commands)
QMAKE_EXTRA_TARGETS += target copydata