Case T-409/20: Judgment of the General Court of 21 December 2021 — KS v Frontex (Civil service — Members of the temporary staff — Fixed-term contract — Termination of the contract — Breakdown in the relationship of trust — Article 47(b)(ii) of the CEOS — Right to be heard — Duty to have regard for the welfare of staff — Requests for assistance and compensation — Action for annulment and compensation)