I'm fascinated by what prompts lead to 'Please try a different prompt.'

New Zealand or Australia lead to the aforementioned error, but The Antipodes generates a set. I thought individual countries had been banned for possibly generating offensive content but it works for Great Britain.

Metallica works, Slipknot doesn't, Iron Maiden does, Nirvana doesn't.

Aperture Science works, so does Black Mesa (the proposed opponent, hehe), Cyberdyne Systems doesn't, Vault-Tec does, Weyland-Yutani also works.

Studio Ghibli doesn't work, Toei Animation does, so does Production I.G. and KyoAni.

Akagi works, JoJo doesn't but JoJo Bizarre Adventure does (so does Joseph Joestar, and it knows Dio Brando is the opponent), Uzumaki does not, BLAME! is accepted but not recognized (a shame), 20th Century Boys is not accepted.

Soviet Union works, Russia does not, neither do most countries. US States are accepted (California's opponent is Florida), so do many cities, with exceptions of Mexico City/Ciudad de Mexico, Pyongyang and Tehran.

Voyager-1 works, Apollo 13 doesn't (for any mission numbers), plain Apollo does (but it's not the space mission), Soyuz does, SpaceX Starship does not.

Vim works, so does Emacs, so does Visual Studio. (I've tried that just to see the proposed opponents)

Dota 2, S.T.A.L.K.E.R., Mass Effect, Half-Life, Deus Ex, Arma 3, BioShock, Elden Ring all work, even Wolfenstein does. Disco Elysium is accepted but produce something unrelated (a shame, again). Can't find a video game that won't be accepted.

Funnily, US Government worked partially for me, failing to produce a single piece.

I tried entering cocaine and it was rejected, but tried coca leaves and it looks quite good. Also my opponents pieces were coffee beans which is a nice color contrast, and with that I beat the easy computer player. My first try a couple hours ago and I chose Grasshopper Pie Milkshake and the opponent it chose was Avocado Toast, and both were green, and I lost.

Heh, being a kiwi I also tried New Zealand multiple times. I can’t think of anything offensive a model may default to for New Zealand.

I tried “Kiwi Bird” and the model produced very underwhelming pieces. Very dark and slightly fluffy.

It suggested "France" was "Britain"'s natural opponent but refused to generate France.

It did not like me saying “Bob Dylan”.

Well, Great Britain isn't a country. Perhaps the filter is too pedantic.

Does Holland work?

Apparently my brain is broken because I can generate almost nothing but pink errors, though it seems to be a bit non deterministic:

Taoism

Tibet

Tibetan Buddhism

Wrathful deities

Existential angst

Dantes inferno

Major religions

Australian indigenous

Salvador Dali

Others generated sets but should have generated errors because the results are so uninspiring:

Mandalas

YouTube face

Phallic symbols

Corporate waste

Asymmetric deformities

Corporate propoganda