Error: Cannot find module 'discord.js'

[GatoGamer7DCP]

EconomyBot@1.0.0 start
node index.js

node:internal/modules/cjs/loader:1148
throw err;
^

Error: Cannot find module 'discord.js'
Require stack:

• /home/runner/EconomyBot/index.js
  at Module._resolveFilename (node:internal/modules/cjs/loader:1145:15)
  at Module._load (node:internal/modules/cjs/loader:986:27)
  at Module.require (node:internal/modules/cjs/loader:1233:19)
  at require (node:internal/modules/helpers:179:18)
  at Object. (/home/runner/EconomyBot/index.js:1:17)
  at Module._compile (node:internal/modules/cjs/loader:1358:14)
  at Module._extensions..js (node:internal/modules/cjs/loader:1416:10)
  at Module.load (node:internal/modules/cjs/loader:1208:32)
  at Module._load (node:internal/modules/cjs/loader:1024:12)
  at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:174:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ '/home/runner/EconomyBot/index.js' ]
  }

Node.js v20.16.0

Have you installed discord.js?
npm install discord.js