Cannot find module 'markdown-it-xxx'

WAIT Extracting site metadata…
Error: Cannot find module 'markdown-it-xxx’
at Function.Module._resolveFilename (module.js:536:15)
at Function.Module._load (module.js:466:25)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at Object.config (C:\Users\lion\Desktop\blog\docs.vuepress\config.js:50:14)
at module.exports (C:\Users\lion\Desktop\blog\node_modules\vuepress\lib\markdown\index.js:52:14)
at resolveOptions (C:\Users\lion\Desktop\blog\node_modules\vuepress\lib\prepare\resolveOptions.js:106:20)
at prepare (C:\Users\lion\Desktop\blog\node_modules\vuepress\lib\prepare\index.js:11:25)

C:\Users\lion\Desktop\blog>npm run dev

blog@1.0.0 dev C:\Users\lion\Desktop\blog
vuepress dev docs

WAIT Extracting site metadata…
Error: Cannot find module ‘markdown-it-xxx’
at Function.Module._resolveFilename (module.js:536:15)
at Function.Module._load (module.js:466:25)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at Object.config (C:\Users\lion\Desktop\blog\docs.vuepress\config.js:50:14)
at module.exports (C:\Users\lion\Desktop\blog\node_modules\vuepress\lib\markdown\index.js:52:14)
at resolveOptions (C:\Users\lion\Desktop\blog\node_modules\vuepress\lib\prepare\resolveOptions.js:106:20)

C:\Users\lion\Desktop\blog>npm run dev

blog@1.0.0 dev C:\Users\lion\Desktop\blog
vuepress dev docs

WAIT Extracting site metadata…
Error: Cannot find module ‘markdown-it-xxx’
at Function.Module._resolveFilename (module.js:536:15)
at Function.Module._load (module.js:466:25)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at Object.config (C:\Users\lion\Desktop\blog\docs.vuepress\config.js:50:14)
at module.exports (C:\Users\lion\Desktop\blog\node_modules\vuepress\lib\markdown\index.js:52:14)
at resolveOptions (C:\Users\lion\Desktop\blog\node_modules\vuepress\lib\prepare\resolveOptions.js:106:20)
at prepare (C:\Users\lion\Desktop\blog\node_modules\vuepress\lib\prepare\index.js:11:25)
at dev (C:\Users\lion\Desktop\blog\node_modules\vuepress\lib\dev.js:23:25)
at args (C:\Users\lion\Desktop\blog\node_modules\vuepress\bin\vuepress.js:105:12)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! blog@1.0.0 dev: vuepress dev docs
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the blog@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! C:\Users\lion\AppData\Roaming\npm-cache_logs\2019-08-13T05_51_40_288Z-debug.log