i run npm start and it showing this pls how do i solve this problem

Question

Starting the development server...

/home/justice/Desktop/testing/testing/node_modules/react-scripts/scripts/start.js:19
  throw err;
  ^

Error: ENOSPC: System limit for number of file watchers reached, watch '/home/justice/Desktop/testing/testing/public'
    at FSWatcher.<computed> (internal/fs/watchers.js:243:19)
    at Object.watch (fs.js:1586:34)
    at createFsWatchInstance (/home/justice/Desktop/testing/testing/node_modules/chokidar/lib/nodefs-handler.js:119:15)
    at setFsWatchListener (/home/justice/Desktop/testing/testing/node_modules/chokidar/lib/nodefs-handler.js:166:15)
    at NodeFsHandler._watchWithNodeFs (/home/justice/Desktop/testing/testing/node_modules/chokidar/lib/nodefs-handler.js:331:14)
    at NodeFsHandler._handleDir (/home/justice/Desktop/testing/testing/node_modules/chokidar/lib/nodefs-handler.js:567:19)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async NodeFsHandler._addToNodeFs (/home/justice/Desktop/testing/testing/node_modules/chokidar/lib/nodefs-handler.js:617:16)
    at async /home/justice/Desktop/testing/testing/node_modules/chokidar/index.js:451:21
    at async Promise.all (index 0)
Emitted 'error' event on FSWatcher instance at:
    at FSWatcher._handleError (/home/justice/Desktop/testing/testing/node_modules/chokidar/index.js:647:10)
    at NodeFsHandler._addToNodeFs (/home/justice/Desktop/testing/testing/node_modules/chokidar/lib/nodefs-handler.js:645:18)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async /home/justice/Desktop/testing/testing/node_modules/chokidar/index.js:451:21
    at async Promise.all (index 0) {
  errno: -28,
  syscall: 'watch',
  code: 'ENOSPC',
  path: '/home/justice/Desktop/testing/testing/public',
  filename: '/home/justice/Desktop/testing/testing/public'
}