Error: Cannot resolve type entity i2.IconsModule to symbol

Question

I am migrating to Angular 15 from 14 and I came across the the above error upon building the project. Worst part is I cant find any reference of the i2.IconsModule withing the project itself. Can you please assist?

./apps/ovn-member-client/src/polyfills.ts - Error: Module build failed (from ./node_modules/@angular-devkit/build-angular/node_modules/@ngtools/webpack/src/ivy/index.js): Error: Cannot resolve type entity i2.IconsModule to symbol

./apps/ovn-member-client/src/main.ts - Error: Module build failed (from ./node_modules/@angular-devkit/build-angular/node_modules/@ngtools/webpack/src/ivy/index.js): Error: Cannot resolve type entity i2.IconsModule to symbol

These are the steps I took:

1. I created a new branch
2. Added the dependencies manually
3. Created a global config file
4. Cleared the node module file and re-ran yarn install
5. Sorted out all possible code issues.
6. Still encountering the 2 "ivy" file issues above.