npm run dev error

[as535364]

gulp: Did you forget to signal async completion?

[09:30:20] 'sync' errored after 11 s
[09:30:20] Error: ENOSPC: System limit for number of file watchers reached, watch 'node_modules/uri-js/dist/esnext/schemes/urn-uuid.js'
    at FSWatcher.start (internal/fs/watchers.js:165:26)
    at Object.watch (fs.js:1254:11)
    at createFsWatchInstance (/home/as535364/文件/Gridea/themes/Delight/node_modules/chokidar/lib/nodefs-handler.js:38:15)
    at setFsWatchListener (/home/as535364/文件/Gridea/themes/Delight/node_modules/chokidar/lib/nodefs-handler.js:81:15)
    at FSWatcher.NodeFsHandler._watchWithNodeFs (/home/as535364/文件/Gridea/themes/Delight/node_modules/chokidar/lib/nodefs-handler.js:233:14)
    at FSWatcher.NodeFsHandler._handleFile (/home/as535364/文件/Gridea/themes/Delight/node_modules/chokidar/lib/nodefs-handler.js:262:21)
    at FSWatcher.<anonymous> (/home/as535364/文件/Gridea/themes/Delight/node_modules/chokidar/lib/nodefs-handler.js:495:21)
    at FSReqCallback.oncomplete (fs.js:150:5)
[09:30:20] 'default' errored after 11 s
[09:30:20] The following tasks did not complete: gulp_nodemon
[09:30:20] Did you forget to signal async completion?
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! gridea-theme-pinghsu@1.0.0 dev: `gulp`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the gridea-theme-pinghsu@1.0.0 dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/as535364/.npm/_logs/2019-07-26T01_30_20_401Z-debug.log