Judgment of the General Court (Tenth Chamber) of 15 April 2026.#Stowarzyszenie Edukacja, Nauka, Kultura v European Research Executive Agency.#Arbitration clause – Research and technological development – Horizon 2020 Framework Programme for Research and Innovation (2014-2020) – Grant agreement – TICASS project – Final audit report – Costs relating to seconded staff members – Ineligible costs – Letter confirming the recovery of part of the sums paid under the grant agreement – Debit note – Reclassification of the action – Recovery of sums paid – Legitimate expectations – Counterclaim.#Case T-479/24.