Ami was on the classroom's roof in the save file you shared with us, but I made a fix so that, despite this, you can talk to her and complete the pending objective. But from what you say, it might have a different bug that we will check (because internally the game showed me that you had not talked to Ami to complete that objective).
About the content of the photo session, do you mean that now you have completed it? or it was completed before? This quest has not started in the save file you shared with us.