JPM Sign fail with "Validation took too long to complete"

JPM [error] FAIL
Error: Validation took too long to complete; last status: {“guid”:“xxxxxxxx”,“active”:false,“automated_signing”:true,“url”:“https://addo
ns.mozilla.org/api/v3/addons/xxxxxxxxxxxxxx/versions/1.0.0.0
/uploads/97fb92963d3841acb8e1c988637eb8d0/”,“files”:[],“passed_review”:false,“pk
”:“97fb92963d3841acb8e1c988637eb8d0”,“processed”:false,“reviewed”:false,“valid”:
false,“validation_results”:null,“validation_url”:“https://addons.mozilla.org/en-
**US/developers/**upload/97fb92963d3841acb8e1c988637eb8d0”,“version”:“1.0.0.0”}
at null._onTimeout (xxxxxxxxx\node_modules\jpm\lib\am
o-client.js:174:14)
at Timer.listOnTimeout [as ontimeout] (timers.js:110:15)

If you can reproduce this reliably, please file a but at https://github.com/mozilla/addons/issues/new.