Commons reacted badly to being substituted late in the match with the visitors trailing by three goals to one.
After initially showing his disgust with Ronny Deila’s decision, he then got into a shouting match with assistant manager John Collins and first-team coach John Kennedy on the Celtic bench.
The playmaker has now shown regret for his actions.
A statement on the Celtic website read: “I’d like to apologise for my reaction last night, something that should never be shown publicly on the field.
“I was very frustrated at how the night had gone. However, I did not handle this in the right way. My frustration at losing games and my desire to win will never change.
“I know we are all part of a team at Celtic and I am proud to be part of this team. I want this team to win and I am sure we can come together, work hard and get the results needed to qualify from this group.
“I still have every confidence we can do this and in a fortnight we have the chance to make amends. That’s the motivation now for us all.”
The spat was picked up by the TV cameras and proved to be another sour note on an already horrendous night for the visitors, whose defensive frailties were exposed time and again by their Norwegian hosts.