HTML5 tsb , adding angular/cdk/collections library fails

Hi,

In v9.2 I have a deep customization of the TSB Angular library that works fine.

Recently I've added the angular/cdk/collections library and imported SelectionModel for one of our tables in tsb. After that , qer-app-portal refuses to load the tsb module with the following error:

GET https://<server>/Apiserver/html/qer-app-portal/@angular/cdk/collections 404 (Not Found) polyfills.d3d72ad5aa388d7e.js

(...)

main.39f7fdec9a3bdbbf.js:1 2025-06-17T05:50:14.908Z ERROR [main.39f7fdec9a3bdbbf.js:1]  Loading of TsbConfigModule (tsb) failed with the following error: Cannot read properties of undefined (reading 'TsbConfigModule') Caller: m

It works fine in dev (using Visual Studio Code), but fails in production.

It seems that something is missing in our build modules but we cannot find what could be the reason.

Any ideas?