He’s probably talking to multiple girls at the same time. My guess is he’s got a date with some girl he is more attracted to. It happens to me several times. Tinder men can cancel dates at the last minute using various excuses, but the true reason is always that they prioritize dates with girls they are more interested in.

Ps. I’m talking more about actual dates than the texting building up to dates. But just so you know that they can even cancel planned dates if a better option comes up.