Error: Can’t walk dependency graph: Cannot find module ‘@popperjs/core’ from ‘node_modules\bootstrap\dist\js\bootstrap.esm.js’

required by D:\pangu\bpmn-js\bpm_editor\node_modules\bootstrap\dist\js\bootstrap.esm.js

When using webpack to package bootstrap 4 and 5, you need to install popper.js manually

npm install @popperjs/core -D