The Scottish champions posted revenue of £59.4 million, a decline of 28.9 per cent from £83.5m in the same period last year.
Barcelona denounces what it sees as a lack of consistency in disciplinary decisions.
PSG regain Achraf Hakimi from suspension, but they are still missing Mayulu and Fabian Ruiz.
The decision follows Barcelona’s move to terminate its relationship with the European Super League.
If found guilty, the midfielder could face disciplinary sanctions which may include a fine or suspension.