'principal' cannot be found on object of type 'java.lang.Object[]' -
maybe not public or not valid"

https://sharing-codeability.uibk.ac.at/sharing/codeability-sharing-platform.git
into jhipster_update_2022_02

Conflicts:
	src/main/webapp/app/exercise/exercise-card/exercise-card.component.ts
	src/main/webapp/app/exercise/import/exercise-import.component.html
	src/main/webapp/app/exercise/import/exercise-import.module.ts

The "(clicked)" property does not work in our config.
The issue is fixed upstream, but requires a newer version of Angular.
We should update Angular and the reactivate this.