Case T-510/20: Order of the General Court of 22 October 2021 — Fachverband Spielhallen and LM v Commission (State aid — Tax treatment of operators of public casinos in Germany — Complaint — Preliminary examination stage — Commission decision finding that there is no State aid — Conditions for initiating a formal investigation procedure — Serious difficulties — Concept of ‘State aid’ — Levy on the profits — Advantage — Selectivity — Action manifestly lacking any foundation in law)