{
"Allow spawning horses inside the building": false,
"Cooldown on usage": 82,800,
"Use NoEscape API": false
}

23h cooldown; can;t make it work. I think daily server restart resets this mods cooldown? and it starts counting anew for all players?

You cannot specify additional commas like you did in the config sample you provided here. The number should be 82800, not "82,800". To be sure about setting your plugin configuration, use some JSON linter such as JSONLint