What does this error mean?

[sharonyue]

1/4 01:32:07 [1511] - error: /register/
 Error: Invalid data
    at Object.User.verifyInvitation (/nodebb/src/user/invite.js:103:20)
    at async.waterfall.plugins.fireHook.postData.content (/nodebb/src/controllers/index.js:168:10)
    at fn (/nodebb/node_modules/async/lib/async.js:746:34)
    at /nodebb/node_modules/async/lib/async.js:1213:16
    at /nodebb/node_modules/async/lib/async.js:166:37
    at /nodebb/node_modules/async/lib/async.js:706:43
    at /nodebb/node_modules/async/lib/async.js:167:37
    at Object.async.waterfall (/nodebb/node_modules/async/lib/async.js:710:44)
    at Controllers.register (/nodebb/src/controllers/index.js:165:8)
    at Layer.handle [as handle_request] (/nodebb/node_modules/express/lib/router/layer.js:95:5)
    at next (/nodebb/node_modules/express/lib/router/route.js:131:13)
    at /nodebb/src/middleware/index.js:104:3
    at /nodebb/node_modules/async/lib/async.js:52:16
    at Object.async.forEachOf.async.eachOf (/nodebb/node_modules/async/lib/async.js:236:30)
    at Object.async.forEach.async.each (/nodebb/node_modules/async/lib/async.js:209:22)
    at middleware.pluginHooks (/nodebb/src/middleware/index.js:100:8)
1/4 01:35:37 [1511] - warn: [deprecated] Accessing language files from `/api/language` is deprecated. Use `/assets/language/zh_CN/language.json` for prefetch paths.

[PitaJ]

@sharonyue it means the was a request to the invite route without the correct parameters. It's nothing to worry about unless your user invitations are not working.

[sharonyue]

@PitaJ
Thanks. I enable invitation, since I want to keep the topics to be high quality.