First this kind of childish unprofessional error by the referees (not counting players or keeping written records for substitutions) RUINS the integrity of the process. To your point, a coach puts a team on the field a day early and gets fired.
Second - while the league is clueless on this, they have reversed the red card on SV keeper and he plays tonight.
You can't do that and ignore this and claim you have it under control.
And make no mistake these are good athletes. The governing body needs to be much better at providing these athletes the environment they need to compete.