Facing issue when building application code, running build but 'CUSTOM_ELEMENTS_SCHEMA' not found

[lozzo2020]

Describe the issue

I'm attempting to work through the Multi-Region workshop to build a UI Layer, Configure and Build the Application Code.

The workshop instructs the use of node.js 8.12.0, however every time I 'run build' whilst using this version, I am informed 'Angular CLI required a minimum Node.js version of either v14.15, or v16.10', and I cannot progress.

Steps to Reproduce

I followed all previous steps in the workshop.

After changing to v14.15/v16.10, use 'npm run build' and get the following errors:

Current behavior
v16.10

v14.15

AWS SDK version used
same in github repo

Operating System and version
Deployed in EC2 Amazon linux 2 machine