The commons.lbl.gov server will be was down for ~1 Hour on Friday, April 5th starting at 6PM while the Confluence software is was being upgraded to a newer version which contains a bugfix for the following security vulnerability:
https://confluence.atlassian.com/doc/confluence-security-advisory-2019-03-20-966660264.html
The current, temporary workaround has been to disable the WebDAV Plugin and Widget Connector Add-ons, which has limited some functions such as embedding Youtube videos, importing Word docs as pages and others. Once the upgrade is complete, those and Office Connector Add-ons will be have been re-enabled.