yarn build fails when building the server-side on a Docusaurus project

[ciarant]

Hi there. I'm having a problem with yarn build failing when using the Docusaurus OpenAPI plugin and am wondering if anyone out there might have any pointer on what I'm doing wrong.

The error is:

[ERROR] Error: Failed to compile with errors.
    at /Users/ciaran/code/docusaurus-auth-cognito/node_modules/@docusaurus/core/lib/webpack/utils.js:180:24
    at /Users/ciaran/code/docusaurus-auth-cognito/node_modules/webpack/lib/MultiCompiler.js:554:14
    at processQueueWorker (/Users/ciaran/code/docusaurus-auth-cognito/node_modules/webpack/lib/MultiCompiler.js:491:6)
    at process.processTicksAndRejections (node:internal/process/task_queues:77:11)

I'm using Docusaurus 2.4.3 and docusaurus-plugin-openapi-docs 2.0.0-beta.4.

I've written up a bit of a longer description about the problem and how to reproduce it in the PROBLEM.md in this Git repo.

Very grateful if anyone could provide me a steer 🙇‍♂️