Maintenance for the week of October 5:
• [COMPLETE] ESO Store and Account System for maintenance – October 8, 8:00AM EDT (12:00 UTC) – 12:00PM EDT (16:00 UTC)
If you aren't within 5 levels of the highest level person in your group you need to do "significant damage" (no definition for that provided by ZoS) in order to get loot or XP.