We have identified and resolved the root issue to these errors. We have all of our build servers back online. We are continuing to monitor the build queues, but have seen error rates return to normal.
You may experience longer than normal queued times as previously failed builds are being restarted, leading to higher than typical volume, but it should not be more than ~30-45 minute "Queued" times.
If you had a failed build in the past 2 days, please submit new builds. We will be working to get the most recent failed build for apps restarted, but you will be quicker to restart these on your apps.
Please submit a support ticket if you are still facing errors.