Stand Alone Build Error - failed to initialize gen domain dsp.gen

No Gen~ objects in use that I'm aware of.

you've got these two in the bpatcher file 'random_sampler'(they contain Graham Wakefield's 'waveset chopper/repeater' from the examples folder) and they're in the signal path leading to the outputs:

i've never tried to build standalone with gen~ inside... i get the same error, even tried including the gen~ chopper_repeater patch, but didn't try this older thread's findings from Ernest, you could try doing what he wrote at the end there:
https://cycling74.com/forums/problem-with-gen-in-standalone

(i don't understand why gen~ doesn't build into standalone more easily in this particular case, though, the gen~ is one that's default/included from the 'examples' folder, so everything should just be found as part of a default setup of Max, at least where the gen~ stuff is concerned... it is indeed a strange standalone-building behavior :/)