What can cause corporate confluence page unreachable for all except for an admin?

[Sangita Patel]

We have a companywide access to the confluence and Jira, All of a sudden except for the site admin, none of us are able to access these apps.  The admin said he deleted something that was huge, I don't know what he deleted but now none of us can get in.  Help!!

[Rob Hean]

Oh no! 

There's a number of possible things they could have done. What specific error are y'all seeing? Without more info - 

1 - deleted a group that provides licensing - this would remove everyone from licensed users

2 - removed access to ALL spaces/content

3 - archived/deleted all/most content

Curious if there's more info you can share? Also, if it's a paid instance, highly recommend reaching out to Atlassian support.

reminder - the forums are 10000% public, please don't post anything sensitive here!