Error when using plug controller

[rainboy93]

When I call the function from PlugKeyRing. I got this error.

Deploying all canisters.
All canisters have already been created.
Building canisters...
Executing 'npx azle demo_backend'

Building canister demo_backend

💣 TypeScript error: Could not resolve "events"

node_modules/@psychedelic/cap-js/dist/kyasshu/index.js:7:25
6| 
7| const events_1 = require("events");
8|                          ^

💀 Build failed
Building frontend...
WARN: Generating type declarations for canister demo_frontend:
  /private/var/xcodeserver/Documents/developer_journey/demo/src/declarations/demo_frontend/demo_frontend.did.d.ts
  /private/var/xcodeserver/Documents/developer_journey/demo/src/declarations/demo_frontend/demo_frontend.did.js
  /private/var/xcodeserver/Documents/developer_journey/demo/src/declarations/demo_frontend/demo_frontend.did
Generating type declarations for canister demo_backend:
  /private/var/xcodeserver/Documents/developer_journey/demo/src/declarations/demo_backend/demo_backend.did.d.ts
  /private/var/xcodeserver/Documents/developer_journey/demo/src/declarations/demo_backend/demo_backend.did.js
  /private/var/xcodeserver/Documents/developer_journey/demo/src/declarations/demo_backend/demo_backend.did

Error: Failed while trying to deploy canisters.
Caused by: Failed while trying to deploy canisters.
  Failed to build all canisters.
    Failed while trying to build all canisters.
      The build step failed for canister 'br5f7-7uaaa-aaaaa-qaaca-cai' (demo_backend) with an embedded error: Failed to build custom canister demo_backend.: Failed to run npx azle demo_backend.: The custom tool failed.

There are several dependencies require like events, assert, crypto ...
Why does this happen