From my failed pinpoint job (https://pinpoint-dot-chromeperf.appspot.com/job/14a13aade40000):

Traceback (most recent call last):
File "/base/data/home/apps/schromeperf/pinpoint:clean-dtu-9662809a.413644294060734375/dashboard/pinpoint/models/job.py", line 350, in Run
work_left = self.state.ScheduleWork()
File "/base/data/home/apps/schromeperf/pinpoint:clean-dtu-9662809a.413644294060734375/dashboard/pinpoint/models/job_state.py", line 139, in ScheduleWork
self._RaiseErrorIfAllAttemptsFailed()
File "/base/data/home/apps/s~chromeperf/pinpoint:clean-dtu-9662809a.413644294060734375/dashboard/pinpoint/models/job_state.py", line 159, in _RaiseErrorIfAllAttemptsFailed
'was:\n%s' % (exception_count, attempt_count, exception))
Exception: All of the runs failed. The most common error (20/20 runs) was:
PathMissingError: Unable to find apk specified by --webview-embedder-apk=None

@dave-2