Cannot read property 'extend'.

[hisham3d]

module.exports = Structures.extend('Message', Message => {
TypeError: Cannot read property 'extend' of undefined
at Object. (/home/container/node_modules/discord.js-commando/src/extensions/message.js:7:29)
at Module._compile (internal/modules/cjs/loader.js:816:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:827:10)
at Module.load (internal/modules/cjs/loader.js:685:32)
at Function.Module._load (internal/modules/cjs/loader.js:620:12)
at Module.require (internal/modules/cjs/loader.js:723:19)
at require (internal/modules/cjs/helpers.js:14:16)
at Object. (/home/container/node_modules/discord.js-commando/src/registry.js:5:25)
at Module._compile (internal/modules/cjs/loader.js:816:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:827:10)