The hydraulic pin holding the tower arm in place did not retract.
If that can be fixed tonight, there will be another launch attempt tomorrow at 5:30 CT.
@elonmusk@SpaceX Elon, throw a tank into space, man. Preferably the Maus, the absurd 188-ton Nazi super-heavy that barely moved on land. Strap that ridiculous thing in, yeet it to orbit, and livestream it. Pure meme fuel.
Starship's bay is nine meters wide with like eighteen meters of height — that monster tank slides right in. And at current targets of 100–150 tons reusable to LEO, even the Maus fits with margin on an expendable flight.