Ошибка при запуске app.js

Вот код /root/.pm2/****/app-error.log


Error: Cannot find module 'redis'
Require stack:
- /var/www/html/server/app.js
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:1014:15)
at Module.Hook._require.Module.require (/root/.nvm/versions/node/v14.0.0/lib/node_modules/pm2/node_modules/require-in-the-middle/index.js:61:29)
at require (internal/modules/cjs/helpers.js:72:18)
at Object.<anonymous> (/var/www/html/server/app.js:8:13)
at Module._compile (internal/modules/cjs/loader.js:1185:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1205:10)
at Module.load (internal/modules/cjs/loader.js:1034:32)
at Function.Module._load (internal/modules/cjs/loader.js:923:14)
at Object.<anonymous> (/root/.nvm/versions/node/v14.0.0/lib/node_modules/pm2/lib/ProcessContainerFork.js:33:23)
at Module._compile (internal/modules/cjs/loader.js:1185:30) {
code: 'MODULE_NOT_FOUND',
requireStack: [ '/var/www/html/server/app.js' ]
}