Cases T-77/18 and T-567/18: Judgment of the General Court of 23 September 2020 — VE v ESMA (Civil service — Members of the temporary staff — Contract for an indefinite period — Appraisal report — 2016 appraisal exercise — Plea of illegality relating to the appraisals guide — Manifest error of assessment — Assessment of activities undertaken as staff representative — Procedural irregularity — Termination of the work contract — Insufficient performance during a period of two years)