Boards are disconnected from the projects

UPDATE:

We have developed a fix for this incident, and we are working on rolling it out to all affected customers right now. The fix will be available within 24 hours, but in most situations much sooner.

Summary

There are several symptoms at play:

1. Boards are not connected to projects, leading to a missing 'backlog' button and making the board very difficult or sometimes impossible to find.
2. Start/Stop sprint functionality is not available.
3. Agile Reports are not available

Steps to replicate

1. Click on Project from the top navigation bar
2. Click on any project
3. Backlog and Active Sprint buttons are missing from the project sidebar

Expected behavior

The Backlog and Active Sprint buttons should display on the project sidebar

Current behavior

The Backlog and Active Sprint buttons are not showing on the project sidebar

Workarounds

There is no workaround.