Ruben Dias should have received a second yellow card and been sent off in Manchester City's game against Nottingham Forest just after Christmas, the PGMO have admitted.
PGMO officials accepted that Dias's challenge on Igor Jesus, 18 seconds into the second half, was worthy of a yellow card. Dias had already been booked in the first half for dissent.
However, the rules state that the VAR cannot intervene in cases of yellow cards, and the referees body was clear in explaining that it was a subjective call by the on-field referee.
Forest complained to the referees body following City's 2-1 victory and requested an explanation. _Sky Sports News_ has been told that club representatives met with officials from PGMO on Monday to analyse the decision not to send City's vice-captain off, and a number of other contentious calls from referee Rob Jones and the other officials in the match.
However, in turn, Forest have accepted that City's winner in that match, when Rayan Cherki scored, was a legitimate goal - despite manager Sean Dyche being very animated post-match, saying that the goal should have been ruled out because he felt that Morgan Gibbs-White was fouled immediately before Cherki's strike.
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FREE TO WATCH: Highlights from Nottingham Forest’s match against Manchester City in the Premier League.
Forest officials accepted that there was no foul on Gibbs-White in the build-up to City's winner, despite the Reds originally feeling that Nico O'Reilly had pulled his England team-mate to the ground, preventing him from blocking Cherki's shot.
Dyche, and Forest's bosses, felt strongly the result could have been different had Dias been sent off with 45 minutes of the match still remaining.
But Sky Sports News has been told both Forest and PGMO felt the meeting was positive and productive, and privately, the East Midlands club have expressed their appreciation for how engaging and open the match officials have been in dealing with their complaints.