The ACS Network underwent a major platform upgrade last night (Nov 2, 2017). Please check your groups. In some cases, the header appear white with white text, and so it is impossible to see the name of the group.
As owner of the group, you can You should be able to click on the gear, select Settings,
You can change the banner by 1. selecting banner, 2. adjusting the colors of the text or adding a background, then 3.saving.
