Team meetings are incredibly important in a team sport like hockey, and missing them for any reason is a serious offence. Best case, it's an issue of preparedness and routine that forced him to be late or no-show. Worst case, he missed the meeting due to personal problems or entirely forgot about it. The most famous scratching for missing a team event has always been
Tyler Seguin with the Boston Bruins, scratched for missing a team breakfast. In Seguin's case, it seems pretty likely that he was out the night before.