For some reason lakitu-release started to fail at the SignerTest step since Feb 3 afternoon.

Last green: https://uberchromegw.corp.google.com/i/chromeos/builders/lakitu-release/builds/1991

First red: https://uberchromegw.corp.google.com/i/chromeos/builders/lakitu-release/builds/1992

The error messages seem to suggest it failed to find a recovery image. FYI lakitu_next-release is failing at a different step but for a similar reason.

@@@STEP_FAILURE@@@
19:28:57: ERROR: Traceback (most recent call last):
  File "/b/cbuild/internal_master/chromite/cbuildbot/stages/generic_stages.py", line 609, in Run
    self.PerformStage()
  File "/b/cbuild/internal_master/chromite/cbuildbot/stages/release_stages.py", line 46, in PerformStage
    raise InvalidTestConditionException('Missing recovery image.')
InvalidTestConditionException: Missing recovery image.

This is blocking our weekly releases hence P1. Can one of the sheriffs help triage?