Kit work right if server no restart,but Kits not save user data when server restarted,"/data/kits/player_data.json"no data,server restart use cmd "quit",how to solve this problem

You have made an error somewhere in  your config, it would help if you posted your config and kits data config.
It is working with no problems on my server and all kits are saved ,

{
  "Kit chat command": "kit",
  "Currency used for purchase costs (Scrap, Economics, ServerRewards)": "Economics",
  "Log kits given": true,
  "Wipe player data when the server is wiped": false,
  "Use the Kits UI menu": true,
  "Allow players to toggle auto-kits on spawn": false,
  "Show kits with permissions assigned to players without the permission": false,
  "Players with the admin permission ignore usage restrictions": false,
  "Autokits ordered by priority": [
    "ExampleKitName",
    "OtherKitName"
  ],
  "Post wipe cooldowns (kit name | seconds)": {
    "ExampleKitName": 3600,
    "OtherKitName": 600
  },
  "Parameters used when pasting a building via CopyPaste": [
    "deployables",
    "true",
    "inventories",
    "true"
  ],
  "UI Options": {
  ......//UI part
  },
  "Kit menu items when opened via HumanNPC (NPC user ID | Items)": {
    "0": {
      "The list of kits that can be claimed from this NPC": [
        "ExampleKitName",
        "OtherKitName"
      ],
      "The NPC's response to opening their kit menu": "Welcome to this server! Here are some free kits you can claim"
    },
    "1111": {
      "The list of kits that can be claimed from this NPC": [
        "ExampleKitName",
        "OtherKitName"
      ],
      "The NPC's response to opening their kit menu": "Welcome to this server! Here are some free kits you can claim"
    }
  },
  "Version": {
    "Major": 4,
    "Minor": 0,
    "Patch": 12
  }
}

No help at all if you post  the default (unchanged) kit config  ?  and no Kits data config ?
You have to create an Autokit with a "name" and enter that in the config

"Autokits ordered by priority": [
"autokit",
"OtherKitName".
],


and try using it with postwipe settings set to "0"

"Post wipe cooldowns (kit name | seconds)": {
"ExampleKitName": 0,
"OtherKitName": 0
},